Functions / String Functions And Operators

substr

Extracts the substring of string starting at the start'th character, and extending for count characters if that is specified.

Reading PG 18current·documented in 27 of 27 versions, 7.1 to 20

7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4 9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19 20

Signatures & examples

substr ( string text, start integer [, count integer ] ) → text

Extracts the substring of string starting at the start'th character, and extending for count characters if that is specified. (Same as substring(string from start for count).)

substr('alphabet', 3) → phabet

substr('alphabet', 3, 2) → ph

substr ( bytes bytea, start integer [, count integer ] ) → bytea

Extracts the substring of bytes starting at the start'th byte, and extending for count bytes if that is specified. (Same as substring(bytes from start for count).)

substr('\x1234567890'::bytea, 3, 2) → \x5678

Version history 3

12 → 13 changed
7.3 → 7.4 changed
7.2 → 7.3 changed

Definition snapshot: b7bd9cda · English manual source