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Merged
merged 1 commit into from
Feb 7, 2025
Merged

pattern-matching-functions-in-PostgreSQL #318

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51 changes: 51 additions & 0 deletions ...-matching-functions-in-PostgreSQL/Pattern-Matching-Functions-in-PostgreSQL-postgresql.sql
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-- The Like operator

SELECT *
FROM Student
WHERE name LIKE 'John%';

SELECT *
FROM Student
WHERE name LIKE 'P____p%';

-- The ILike operator

SELECT *
FROM Student
WHERE name ILIKE '%rob%';

SELECT *
FROM Student
WHERE name ILIKE 's%' AND gpa > 3.5;

-- The similar to operator

SELECT *
FROM Student
WHERE name SIMILAR TO '[JRP]%y';

SELECT *
FROM Student
WHERE birth_date::TEXT SIMILAR TO '200[0-2]-%';

-- POSIX Regular Expressions

-- The ~ and ~* Operators

SELECT *
FROM Student
WHERE name ~ '^R.*a$';

SELECT *
FROM Student
WHERE name ~* 'Bert';

-- The !~ and !~* Operators

SELECT *
FROM Student
WHERE enrollment_date::TEXT !~ '^2020';

SELECT *
FROM Student
WHERE gpa::TEXT !~* '^[4-5]\.';