In this PostgreSQL tutorial, I will explain how to change the data type of a column in PostgreSQL. This tutorial covers the syntax for changing a column data type, changing data type from integer to varchar, changing data type from text to JSON, and changing data type from text to boolean. It explains two ways to change the data type using the ALTER TABLE command with an ALTER COLUMN option and using the type cast operator.

Additionally, I have covered the following queries: 
1. What is syntax to change the data type of the columns
2. How to change column type from integer to varchar in Postgresql
3. How to change column type from text to json in Postgresql
4. How to change column type from text to boolean in Postgresql

Check out the complete tutorial on Change Data Type in PostgreSQL: [ Ссылка ]

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