pattern-matching-functions-in-PostgreSQL

Author: samuelkaranja

sql-queries-9/pattern-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]\.';