cast integer to string postgresql code example

Example 1: postgresql cast

SELECT '100'::INTEGER;
SELECT CAST ('100' AS INTEGER);

Example 2: postgres convert number to string

Because the number can be up to 15 digits, you'll need to cast to an 64 bit (8-byte) integer. Try this:

SELECT * FROM table
WHERE myint = mytext::int8
The :: cast operator is historical but convenient. Postgres also conforms to the SQL standard syntax

myint = cast ( mytext as int8)
If you have literal text you want to compare with an int, cast the int to text:

SELECT * FROM table
WHERE myint::varchar(255) = mytext