In PostgreSQL, the RENAME TO clause is used with the collaboration of the ALTER TABLE statement to rename an already existing table.
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In PostgreSQL, the RENAME TO clause is used with the collaboration of the ALTER TABLE statement to rename an already existing table.
In PostgreSQL, the INTEGER data type facilitates the user to store the numerical data between the range of -2,147,483,648 to +2,147,483,647 numbers.
To use TIME data type in Postgres, first, create a table with a TIME-type column. Once created, you can insert any time value into that column using the INSERT command.
To perform calculations on a set of rows, the aggregate functions are used. These functions perform calculations on the table rows and return only a single row.
PostgreSQL provides a wide range of data types, such as textual, numeric, and temporal, for efficient data storage and manipulation.
A database object is an entity defined in a database and is used to store or reference data. In Postgres, database objects are created using the CREATE command.
Use the “sudo apt install postgresql postgresql-contrib” command to install PostgreSQL from Debian 12’s default repository.
The ARRAY_UPPER() function in PostgreSQL returns the upper bound of the array dimension or the highest index of an array.
To kill a process in Postgres, first, find the “pid” for all the processes, and then run the “pg_cancel_backend(pid)” and “pg_terminate_backend(pid)” commands.
In Postgres, the meta-commands like “\d”, “\dt”, “\dv”, “\ds”, and “\df” are used to describe relations, tables, views, sequences, and functions, respectively.