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How to Use EXCEPT Operator in PostgreSQL?

In PostgreSQL, EXCEPT returns the rows that exist in the result set of the first SELECT query but not in the result set of the second SELECT query.

How to Use Check Constraint in PostgreSQL?

CHECK constraints in PostgreSQL allow us to specify Boolean conditions for inserting or updating values in one or more columns.

PostgreSQL SERIAL- How to Create Auto-increment Columns

PostgreSQL offers a Pseudo-type known as SERIAL. It allows Postgres users to create auto-incremented columns in a table. Using SERIAL, you can create a sequence of integers.

PostgreSQL NOT NULL Constraint With Examples

The NOT NULL constraint ensures that the column accepts only non-null values. In Postgres, the CHECK constraint can be used as an alternative to the NOT NULL.

How to Use ABS() Function in PostgreSQL

PostgreSQL offers a built-in mathematical function named ABS() that takes an expression as an argument and retrieves an absolute value for the specified number.

How to Round Numbers in PostgreSQL

PostgreSQL offers several built-in math functions such as ROUND(), CEIL(), and FLOOR() to round a number up to specific decimal places.

How to Optimize Postgres Performance Using ANALYZE and VACUUM Commands

PostgreSQL offers several commands to optimize, improve or maintain the health of a database, tables, etc., such as ANALYZE and VACUUM commands.

How to Use VACUUM Command in PostgreSQL

In Postgres, VACUUM is a command-line utility that vacates the space engaged by obsolete records, tuples, etc. It optimizes the performance of the Postgres databases, records, etc.

How to Use MOD() Function in PostgreSQL?

The MOD() function is one of the built-in mathematical functions in Postgres that perform the modulo operation on two numbers and retrieves the remainder.

How to Use ANALYZE Command in PostgreSQL

PostgreSQL offers a convenient command named ANALYZE that collects the statistics about a database, table, or table’s columns for the query planner.