PostgreSQL Data Type Conversion Guide

In PostgreSQL, you can convert data types using the CAST function or the :: operator.

1. Use the CAST function for data type conversion:
   Syntax: CAST(expression AS data_type)
   Example: SELECT CAST(‘123’ AS integer);
2. Perform data type conversion using the :: operator:
   Syntax: expression::data_type
   Example: SELECT ‘123’::integer;

It is important to note that data type conversion may lead to errors, especially when the source data cannot be converted to the target data type. Therefore, it is advisable to ensure that the source data can be correctly converted to the target data type before performing any data type conversion.