Scala's pattern matching and quasiquotes) in a novel way to build an extensible query. Suppose we want to retrieve all the records with string SQL in the ending and any number of characters before it in the technologies field. On the other hand, they’re somewhat limited. The pattern doesn’t necessarily need to be a literal string. SQL LIKE OPERATOR with CASE Statement. A logical operator like the Comparison operator returns a boolean value of TRUE, FALSE, or UNKNOWN. This means you can use your patterns table in a query i. A SQL operator is a special word or character used to perform tasks. ANY. 0. FROM "table_name". A wildcard character is used to substitute one or more characters in a string. Oracle like Pattern-matching LIKE Condition. Do not use = or <> when you use SQL patterns. Dive deep into the fascinating world of SQL with our comprehensive set of Multiple-Choice Questions (MCQs). A regular expression is a character sequence that is an abbreviated definition of a set of strings (a regular set). B) EXISTS operator. Data Warehousing Guide; Relational Analytics ; SQL for Pattern Matching ; 21 SQL for Pattern Matching9. Syntax: SELECT ascii ('t'); Output: 116. Since SQL:2008, the SQL standard includes a LIKE_REGEX operator that performs pattern matching according to the XQuery regular expression standard. Two types of wildcards are used in Postgres to specify a pattern: a percentage sign, “%,” and an underscore sign, “_”. expr LIKE pat [ESCAPE 'escape_char']. % – It matches zero or more characters. It does not perform the EF-check in the regex but elsewhere in the query as that would make the regex far more complicated: ^(dd[A-Z])|(dd[A-Z]{2})$. col LIKE p. Data Warehousing Guide; Relational Analytics ; SQL for Pattern Matching ; 22 SQL for Pattern MatchingIf there will be a trailing whitespace at the beginning or at the end it will not get the exact match so use LTRIM () or RTRIM () to get rid of the whitespaces. Row Pattern Recognition (RPR) uses regular expressions to identify patterns in a sequence of rows. 8 describes regular expressions. It allows you to search for. SQL pattern matching uses the LIKE and NOT LIKE operators rather than = and != to perform matching against a pattern string. MySQL supports another type of pattern matching operation based on the regular expressions and the REGEXP operator. In PostgreSQL, the ILIKE operator performs the case-insensitive pattern matching on a string. Query: SELECT * FROM Emp1 WHERE Name LIKE 'S%';Cast expressions perform an explicit conversion to a target type. Define patterns of rows to seek using the PATTERN clause of the. None of these. Using the quantifier ? for pattern matching in Python makes it easy to accommodate variations in spellings or other optional elements. 8. Pattern = " [^a-zds. SQL Wildcard Characters. Table 12. Use the LIKE or NOT LIKE comparison operators instead. Add a comment. Post Answer. SQL pattern matching enables you to use _ to match any single character and % to match an arbitrary number of characters (including zero characters). The IN operator cannot compare anything with NULL values. A regular expression is a character sequence that is an abbreviated definition of a set of strings (a regular set). Also, Read Best SQL Server Interview. MATCH_RECOGNIZE enables you to do the following tasks: . SIMILAR TO regular expressions. %, _) to match the pattern. Description. matching_column; table1: First table. Operator Description Example = Equal to: Try it > Greater than: Try it <. The syntax is as follows:SELECT "column_name"FROM "table_name"WHERE "column_name" LIKE {PATTERN} {PATTERN} often consists of wildcards. The result is FALSE if none of the operands are NULL and the source operand does not match the pattern operand. The LIKE operator is a case-sensitive character operator that employs two special “wildcard” characters to specify a pattern: the percent sign (%) indicates any. Which is the subset of SQL commands used to manipulate Oracle Database structures, including tables? A. For example, it can be specified as a string expression or table column. This video is contributed by Trishaank Kandhi. Logical operators are used to combine or manipulate the conditions given in. The operator returns TRUE when the search value present within the range otherwise returns FALSE. Answer & Solution Discuss in Board Save for Later ). Syntax. Queries can perform equality comparison on columns encrypted using deterministic encryption, but no other operations (for example, greater/less than, pattern matching using the LIKE operator, or arithmetical. Person table I changed 3 last names ending in 'n' to 'N', and then ran the following queries: SELECT COUNT (*) FROM Person. Starting with character -The given query returns all records of students whose. 6 Answers. Oracle 11g R2 Schema Setup: CREATE TABLE table_name ( Col1, Col2 ) AS SELECT 'a', 'data' FROM DUAL UNION ALL SELECT 'a/b', 'data' FROM DUAL UNION ALL SELECT 'a/b/c', 'data' FROM DUAL UNION ALL SELECT 'a/b/c/d',. A percent sign (%) matches any sequence of zero or more characters. The concatenation operation is used to combine character strings, columns of a table or it can also be used for the combination. Using the LIKE clause in an SQL query, we compare the pattern in the query with the pattern present in a table. The delimiter can be any character that is not a letter, number, backslash or space. 0. The correct answer to the question “Which operator performs pattern matching in SQL” is option (b). Explanation: LIKE is a keyword that is used in the WHERE clause. 1) introduced a new operator that we can use in SQL queries. (d {1,2}). Otherwise, the result is 0. 3. This is where the SQL LIKE Clause comes to the rescue, often coupled with the WHERE Clause in SQL. PostgreSQL does not yet implement this operator, but you can get very similar behavior using the regexp_match() function, since XQuery regular expressions are quite close to the ARE. But if your patterns are such that col could match more than one, you should use the DISTINCT query modifier. The LIKE clause uses the following symbols known as wildcard operators in SQL to perform this pattern-matching task in SQL. It allows you to search for strings that match a specific pattern. PostgreSQL does not yet implement this operator, but you can get very similar behavior using the regexp_match() function, since XQuery regular expressions are quite close to the ARE syntax described. to match a newline, and q to quote the whole pattern (reducing the behavior to a simple substring match). The LIKE operator provides a measure of pattern matching by allowing you to specify wildcards for one or more characters. SELECT *. SQL tutorial provides basic and advanced concepts of SQL. SQL patterns (see Recipe 4. Updating entities with PUT and PATCH using raw SQL queries; 81. The LIKE expression returns true if the string matches the supplied pattern. SQL tutorial provides basic and advanced concepts of SQL. Remarks. Supported in SQL Server. With mastery of the LIKE operator, you can efficiently query and retrieve data that meets specific pattern matching criteria, enabling you to gain valuable insights and perform targeted analysis in SQL. LIKE calculates strings using characters as defined by the. There are three separate approaches to pattern matching provided by the database: the traditional SQL LIKE operator, the more recent SIMILAR TO operator, and POSIX-style. The LIKE operator in SOQL and SOSL supports escaping of special characters % or _. The LIKE conditions specify a test involving pattern matching. SELECT UNIQUE. However, wildcard characters can be matched with arbitrary fragments of the character string. The LIKE operator is used with the WHERE clause. % (percentage): It can represent either zero, one, or multiple characters with a variable length. With regular expressions, you can just give the pattern ^T [aeiou]w*!. The underscore sign _ represents one, single character. It is a feature more prevalent in functional languages. In SQL Pattern matching, _ is used to match single character and % is used to match an arbitrary number of characters. 5 introduced PCRE Regular Expressions, which dramatically increases the scope of matching into areas like recursive patterns, look-ahead assertions, and more. 21. In MySQL, SQL patterns are case-insensitive by default. I will probably have a mistake somewhere. The SQL AS clause can only be used with the JOIN clause. BETWEEN Operator. In PostgreSQL, LIKE, NOT LIKE, and ILIKE operators are used along with the wildcards to perform the pattern matching. Option B) Like Operator is the Correct Answer. Do add a 👍 on this feature request so that we can take a look at the priority of this. View solution. 3, “Type Conversion in Expression Evaluation”. Note: The character(s) in the pattern is case sensitive. It compares the given pattern in the input string and returns the result which is matching with the patterns. To check whether the left operand is less than or not than the right operand and this operator returns TRUE if it is found the truth. pattern); In the example patterns, there's no way col could match more than one pattern, so you can be sure you'll see each row of tbl at most once in the result. To do this, we have applied the query that uses the ^ symbol to indicate the beginning of the string, followed by the pattern D. Character Classes and Sets. Pattern Matching in C#. Many Unix tools such as egrep, sed, or awk use a pattern matching language that is similar to the one described here. Finds which pattern variable applies to. It provide a powerful and flexible pattern match that can help us implement power search utilities for our database systems. Command Reference Guide. Subject: SQL - Technology. ON table1. It looks like you are using Always Encrypted to encrypt this column. The SQL LIKE Operator. A POSIX regular expression is a sequence of characters that specifies a match pattern. Which operator performs pattern matching? A) BETWEEN operator79. 4- What operator tests column for the absence of data? a) EXISTS operator b) NOT operator c) IS NULL operator. B. It can include comparison operators and other operators like ‘AND’ operator, ‘OR’ operator, etc. Modified 3 years, 8 months ago. A percent symbol ("%") in the LIKE pattern matches any sequence of zero or more characters in the string. 4- What operator tests column for the absence of data? a) EXISTS operator. To represent zero, one or more than one character, % (percentage) is used. rating FROM sailors s, reserves r WHERE s. A pattern is a combination of a test, which is called a predicate; a target; and a set of local variables, which are called pattern variables. B) Combines the output from multiple queries and must include the same number of columns. When you test for a match for this type of pattern, use the REGEXP_LIKE () function (or the REGEXP or RLIKE operators, which are synonyms for REGEXP_LIKE ()). This function can be used with string expressions and table columns. Using the Like operator. mysql> SELECT 10 LIKE '1%'; -> 1. It has the syntax regexp_matches ( string, pattern [ , flags ]). You may try binding the entire LIKE expression to a single placeholder: @Query(value = "SELECT * FROM table_name WHERE column_name LIKE :pattern") List<Object[]> findPattern(String pattern);I'm creating a DataModel in Oracle Fusion Financials to match parties together, from supplier use and customer use. Wildcards are used in conjunction with the comparison operator LIKE, NOT LIKE,% percent , _ underscore. 2. Distinct. Supplementary Characters (Surrogate Pairs) The LIKE clause uses the following symbols known as wildcard operators in SQL to perform this pattern-matching task in SQL. Wildcard Pattern Matching. This kind of SQL query uses wildcard characters to match a pattern, rather than specifying it exactly. The LIKE operator is a powerful tool that can be used to perform pattern matching in SQL. The pattern need not be a literal string. There are six types of SQL operators that we are going to cover: Arithmetic, Bitwise, Comparison, Compound. Do not use = or <> when you use SQL patterns. The SQL Like is a logical operator that is used to determine whether a specific character string matches a specified pattern. Plain SQL does not excel at searching inside text fields. To do this, you can use the character class [sp] to match the first letter, and you can use the character class [aeiou] for the second letter in the string. 1. This operator returns TRUE rows from the database table if the value of the column is same as the value specified in the query. value of any ordinary row pattern column reference is null. mysql> SELECT 10 LIKE '1%'; -> 1. The pattern matching operators of all three kinds do not support nondeterministic collations. Different. AFTER MATCH. e. Pattern matching in SQL is performed using the MATCH_RECOGNIZE clause. 0. <graph_search_pattern> Specifies the graph match pattern. This operator works the same as the REGEXP_LIKE() function. value of any aggregate or row pattern navigation operation is computed using an empty set of rows (so any COUNT is 0, and all other aggregates and row. 5- In SQL, which. I have seen some examples on RegEx, but confused as to how to apply it the same way in SQL Server. Concatenation Operator. In SQL, which command is used to SELECT only one copy of each set of duplicable rows A. Discuss this Question. SQL UPDATE WITH LIKE Operator Example. ANY. LIKE operator. An SQL query usually begins with a LIKE clause before a WHERE clause. The pattern need not be a literal string. POSIX regular expressions provide a more powerful means for pattern matching than the LIKE and SIMILAR TO operators. The is operator checks if the run-time type of an expression result is compatible with a given type. For patterns that include anchors (i. POSIX regular expressions provide a more powerful means for pattern matching than the LIKE and SIMILAR TO operators. At the core of Spark SQL is the Catalyst optimizer, which leverages advanced programming language features (e. pattern AS matching_pattern, ST. In this syntax, the REGEXP operator returns 1 if the expression matches the pattern or 0 otherwise. Syntax of LIKE operator. For example, you can easily write a SQL pattern %abc% to find strings that contain abc, but you cannot write a single SQL pattern to identify strings that contain any of the. Using a variable and pattern matching in SQL LIKE. 7) are likely to be implemented by other database systems, so they’re reasonably portable beyond MySQL. The AS clause in SQL is used to defines a search condition. First, you supply the expression that you want to match. 1), you can use the MATCH_RECOGNIZE clause to perform pattern matching in SQL to do the following: Logically partition and order the data that. MySQL attempts in such cases to perform implicit conversion of the expression to a string. I also tried this:Here we are going to see a list of important SQL questions in MCQ style with an explanation of the answer for competitive exams and interviews. In this guide, we will explore the power of SQL wildcards, their. What operator performs pattern matching? A) IS NULL operator B) ASSIGNMENT operator C) LIKE operator D) NOT operator. The default for the clause is AFTER MATCH SKIP PAST LAST ROW. PostgreSQL does not yet implement this operator, but you can get very similar behavior using the regexp_match() function, since XQuery regular expressions are quite close to the ARE syntax described. Question 44 Marks: 1 Which of the following is true about the SQL AS clause? The AS clause in SQL is used to change the column name in the output or assign a name to a derived column. This operator can be useful in cases when we need to perform pattern. Case-insensitive search is a much-requested feature, partly (I suspect) to maintain compatibility with Microsoft SQL Server. Doc Preview. 1 Overview of Pattern Matching in Data Warehouses. SELECT DIFFERENT. Not supported in MySQL, Oracle, DB2, and SQLite. As @haki says this is not the sort of question which is solvable by standard SQL. You will learn more about wildcards. Normally, if any expression in a string comparison is case-sensitive, the comparison is. Examples of SQL String Operators. I'm trying to find the most efficient way to do some pattern validation in T-SQL and struggling with how to check against a list of values. SQL LIKE with the ESCAPE clause example. e What operator performs pattern matching? View Answers. The SQL LIKE operator is used to perform pattern matching against character data. SELECT UNIQUE C. Unfortunately, the best way to do this would be using prisma. Which operator performs pattern matching? A. It also provides the REGEXP and RLIKE operators. For each pattern match, it is possible either to return a summary row like in the GROUP BY clause of the SELECT. Character-based Querying and Reporting Tools User Guide. This example works: SELECT * FROM SomeTable WHERE Code LIKE ' [0-9]JAN [0-9] [0-9]' OR Code LIKE ' [0-9]FEB [0-9] [0-9]' OR Code LIKE ' [0-9]MAR [0-9] [0-9]' OR Code LIKE ' [0-9]APRIL [0-9] [0-9] but I am. API with NestJS #81. An underscore (_) matches any single character. When using wildcards, you perform a SQL partial match instead of a SQL exact match as you don’t include an exact string in your query. MATCH_RECOGNIZE enables you to do the following tasks: Logically partition and order the data that is used in the MATCH_RECOGNIZE clause with its PARTITION BY and ORDER BY clauses. This affects only comparisons. I have the following data in a Table PriceOrderShipped PriceOrderShippedInbound PriceOrderShippedOutbound In SQL I need to write a query which searches for a string in a table. It matches any pattern based on some conditions. CIS NETWORKS. [xyz] [^] - Match any character not in the brackets, e. c) EXISTS operator. 1. What Operator Performs Pattern Matching?Searches for precise or fuzzy (less precise) matches to single words and phrases, words within a certain distance of one another, or weighted matches in SQL Server. In SQL, there are two wildcards: SQL has a standard pattern matching technique using the 'LIKE' operator . MATCH_RECOGNIZE enables you to do the following tasks: . 3, “Type Conversion in Expression Evaluation”. field_name – It represents the name of a column on which the regular expression needs to be applied on. Specifically: it allows us to identify records that mark the beginning of a set of records that together form a pattern. Total views 100+ GOKUL Polytechnic Colleges. SELECT DISTINCT. D) None of these. index(): Similar to find(), but raises an exception if the substring is not found. LIKE operator. Examveda Which operator performs pattern matching? A. Below is the syntax of the LIKE operator in a SELECT statement: SELECT [ column_list | * ] FROM table_nameWHERE column or expression LIKE pattern; Notice that the column name or the expression to be searched comes before LIKE in SQL. You can actually use this kind of table which contains a list of patterns and have those patterns "applied" in a query like this : SELECT PT. txt textfiles/ moves (mv) all files with names ending in . LIKE operator is used for pattern matching, and it can be used as -. You specify a pattern as a regular expression, which is composed of event types defined in the DEFINE. Which operator is used for pattern matching? LIKE operator LIKE operator is used for pattern matching, and it can be used as -. PATINDEX performs comparisons based on the collation of the input. Various pattern and their usage are described below. The LIKE operator provides standard pattern matching in SQL that is always used after a WHERE clause. Hide Answer c) IS NULL operator. hii, The "LIKE" operator performs the pattern matching in SQL. The other type of pattern matching provided by MySQL uses extended regular expressions. In MySQL, SQL patterns are case-insensitive by default. Java pattern. MATCH_NUMBER () function returns the sequential match number of the empty match. Pattern matching is a versatile way of. Start by connecting to your PostgreSQL or YugabyteDB instance. In SQL, which command is used to remove a stored function from the database? C) DROP FUNCTION. AND Combines two conditions and evaluates to TRUE when both of the. The getPerimeter example contains two patterns, s instanceof Rectangle r and s instanceof Circle c: . LIKE operator. '%' , '_' , '[]' , '[^]' . The LIKE operator is case-sensitive, meaning that the casing in the <pattern> you want to filter for should match the same-case in your column values; for columns with varied casing, leverage the case-insensitive ILIKE operator. Pattern matching is Boolean in nature, which implies there are two possible outcomes: either the expression matches the pattern or it does not. Furthermore, Flink’s SQL API provides a relational way of expressing queries with a large set of built-in functions. 0. The % wildcard in SQL is used to represent zero or more characters. The ISO/IEC 9075:2016 standard [] introduces support for a concept called Row Pattern Recognition as a part of SQL. Using wildcards for inexact matching. ^ for the start, $ for the end), match at the beginning or end of each line for strings with multiline values. The syntax goes like this: 21. Usage Notes¶. A View can either have all the rows of a table or specific rows based on certain condition. Which operator performs pattern matching ? A) LIKE operator. ALL. 2. In 12c and below, you need to use Oracle data cartridge to create dynamic SQL in SQL. Following are the string functions defined in SQL: ASCII (): This function is used to find the ASCII value of a character. 21. In this set, each record satisifies a certain. Design pattern Design pattern explain factory pattern. Using Multiple _ Wildcards in the LIKE Condition. It is not the operator that is case sensitive, it is the column itself. It is commonly used in a Where clause to search for a specified pattern in a column. 1. count(): Returns the number of times a substring occurs in the string. There are six types of SQL operators that we are going to cover: Arithmetic, Bitwise, Comparison,. SELECT UNIQUE. Since SQL:2008, the SQL standard includes a LIKE_REGEX operator that performs pattern matching according to the XQuery regular expression standard. When you test for a match for this type of pattern, use the REGEXP_LIKE() function (or the REGEXP or RLIKE operators, which are synonyms for REGEXP_LIKE() ). Unfortunately, the best way to do this would be using prisma. , an underscore “_” and a percent signPattern Matching Pattern Matching hello, What operator performs pattern matching? hii,ADS_TO_REPLACE_1 The "LIKE" operator performs the pattern matching in SQL. If the pattern contains no anchors or if the string value has no. 8. For example, you can use the wildcard "C%" to match any string beginning with a. Hide Answer b) LIKE operator. The MATCH_RECOGNIZE operator allows us to detect patterns in our relational data. But, it also supports the regular expression pattern matching for better functionality. Two barriers are often used in conjunction with the LIKE : %: Used to match zero or more characters. This kind of SQL query uses wildcard characters to match a pattern, rather than specifying it exactly. This operator is highly used by the database users in Structured Query Language. They are used with the LIKE operator in SQL, to search for specific patterns in character strings or compare various strings. 1 Overview of Pattern Matching in Data Warehouses. This example works: SELECT * FROM SomeTable WHERE Code LIKE ' [0-9]JAN [0-9] [0-9]' OR Code LIKE ' [0-9]FEB [0-9] [0-9]' OR Code LIKE ' [0. 7 Pattern Matching. For that, we can use a pattern-matching query like WHERE firstname LIKE ‘An%’. ESCAPE expressions evaluate to exactly one octet—or one UTF-8 character for non-default locales. We can use Column Collation with T-SQL RegEx functions to perform. The LIKE operator is used in a WHERE clause to search for a specified pattern in a column. The LIKE conditions specify a test involving pattern matching. In both tables there is a column that exhibits a concatenation of sub-strings. Option B) Like Operator is the Correct Answer. Modified 1 year, 3 months ago. 1 Overview of Pattern Matching in Data Warehouses. SQL wildcards are supported in pattern:. Performs a bitwise logical AND operation between two integer values. [^xyz] string: Required. Find that Begin with a Specific Letter. Which operator performs pattern matching ? A) LIKE operator. Starting with character -The given query returns all records of students whose. Oracle MySQL Sample Queries: Case insensitive: select * from database where column like '%THANK YOU%'; Case sensitive: select * from database where column LIKE BINARY '%THANK YOU%'; Show 1 more comment. MySQL attempts in such cases to perform implicit conversion of the expression to a string. ) If you just want all the rows, even if an employee comes up for more than one of the passed in patterns (which means 'john' would be returned twice if your parameter was 'jo,oh'), you can just say:Database Data Warehousing Guide; Relational Analytics ; SQL for Pattern Matching ; 21 SQL for Pattern Matching22. The equality operator checks if two values are equal and returns True if they match, and False otherwise. If a string function is given a binary string as an argument, the resulting string is also a binary string. String matching where one string contains wildcard characters. Unless explicitly mentioned otherwise (check the collate clause bellow) when a new database is created it inherits the collation from the instance and when a new column is created it. LIKE cluase in yii2 and make LIKE pattern search with case. In MySQL, the LIKE operator performs pattern matching using an SQL pattern. For example, we may wish to retrieve all columns where the tuples start with the letter ‘y’, or start with ‘b’ and end with ‘l. None of these. Using the % wildcard to perform a. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. The logical operators are used to perform operations such as ALL, ANY, NOT, BETWEEN etc. ; } } } Here is a number pattern class Pattern { public. Next, we want to search for those documents where the field starts with the given letter. In this article we will see all types of SQL operators. CLASSIFIER () function returns null. Note. Case Sensitivity and Pattern Matching. 1 Overview of Pattern Matching in Data Warehouses. pattern can be a maximum of 8,000 bytes. In MySQL, the LIKE operator performs pattern matching using an SQL pattern. The syntax is as follows: SELECT "column_name". Note that the REGEXP is a synonym for the REGEXP_LIKE () function. Some examples are shown here. Explanation. pattern: is the regular expression match_option: provides the option to change default matching. Regular expressions, often. One of the most commonly used patterns in AI is the instance pattern, where a pattern is defined on the basis of an individual occurrence rather than a particular number of occurrences. In SQL, the LIKE operator provides a powerful mechanism for performing pattern matching within text data. To represent zero, one or more than one character, % (percentage) is used. ]+". SELECT column_name (s) FROM table. pattern: is the regular expression match_option: provides the option to change default matching. Pattern matching in SQL is performed using the MATCH_RECOGNIZE clause. In this lesson, we'll learn ways to have more flexible, "fuzzier" filters when querying data. SELECT column1, coulmn2, . The [0-9] wildcard character matches any single digit, so this query will return all products that match the exact pattern specified. Here, * is a wildcard standing for "any string of characters except /" and *. Like LIKE, the SIMILAR TO operator succeeds only if its pattern matches the entire string; this is unlike common regular expression behavior where the pattern can. Find that Begin with a Specific Letter. Whereas the equality operator (=) exactly matches one character value to another, the LIKE conditions match a portion of one character value to another by searching the first value for the pattern specified by the second. Between p Flag question b. You can use INSTR to find the last occurrence of a character and SUBSTR to remove it: SQL Fiddle. 1 Overview of Pattern Matching in Data Warehouses. Notice that the category_id of 125 was not selected because, the _ wilcard matches only on a single character. A logical operator is used to determine whether a character string matches a specific pattern by using the SQL Like. 1 Overview of Pattern Matching in Data Warehouses. I need to match bellow mentioned patterns using SQL. We are using an SQL script-like operator to speed up. _ (underscore) represents exactly one character. It is possible to use LIKE clauses with. Pattern Matching Using SQL. MATCH_RECOGNIZE enables you to do the following tasks: Logically partition and order the data that is used in the MATCH_RECOGNIZE clause with its PARTITION BY and ORDER BY clauses. Some examples are shown here. Pattern Matching Using SQL. It enables users to use _ to match a single character and % to match an arbitrary number of. With mastery of the LIKE operator, you can efficiently query and retrieve data that meets specific pattern matching criteria, enabling you to gain valuable insights and perform targeted analysis in SQL.