LIKE condition in PostgreSQL

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PostgreSQL LIKE
To filter the results, the PostgreSQL LIKE condition is used with a combination of WHERE Clause in SELECT, INSERT, UPDATE and DELETE statements to perform pattern matching.

Syntax: 

WHERE expressions LIKE pattern [ ESCAPE 'escape_character' ]

Parameters:
expressions: It is used to specify a column or a field.
pattern: It is used to specify the character expression for pattern matching.
escape_character: It is an optional parameter which is used to test for literal instances of a wildcard character such as

Example: Using wildcard: Percent( Students table:

ID NAME AGE
1 Joy 5
2 Smiley 13
3 Happy 11
4 Tom 15
5 Jerry 10
6 Bruno  6
7 David  8

Query: 

SELECT “AGE”  
FROM “STUDENTS”  
WHERE “NAME” LIKE 'Dav%';

Output: 

AGE
6
8

Example: Using wildcard: Underscore(_).
Students table:

ID NAME AGE
1 Joy 5
2 Smiley 13
3 Happy 11
4 Tom 15
5 Jerry 10
6 Bruno  6
7 David  8

Query: 

SELECT “AGE”  
FROM “STUDENTS”  
WHERE “NAME” LIKE 'Dav_son';

Output: 

AGE
6