CHECK constraints in PostgreSQL allow us to specify Boolean conditions for inserting or updating values in one or more columns.
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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.
PostgreSQL Column Alias With Practical Examples
In PostgreSQL, column aliases are temporary alternative names assigned to columns. The aliases are temporary alternatives, so they exist temporarily during the query’s execution.