![]() ![]() Postgres' UNLOGGED tables are special types of tables intended to store temporary or intermediate results that can be regenerated if necessary. ![]() How to Create an UNLOGGED Table Via the CREATE TABLE AS SELECT Command in Postgres? The output snippet proves that a temporary table has been created with the same data as the “ author_details” table. To verify the table’s creation, execute the SELECT * command as follows: SELECT * FROM temp_author To do this, the “ CREATE TABLE AS SELECT” statement will be executed as follows: CREATE TEMP TABLE temp_author AS Let’s say we need to create a temporary table with the same structure as the “author_details” table. Let’s learn how to create a temporary table via the below example:Įxample: How Do I Create a Temporary Table in Postgres? These tables are available only in the current database session and disappear once a session has expired. Note: A temporary table in Postgres has a short lifespan. Use the TEMP keyword along with the CREATE TABLE AS command to create a temporary table in Postgres: CREATE TEMP TABLE tab_name AS How to Create a TEMPORARY Table Via the CREATE TABLE AS SELECT Command in Postgres? The output snippet authenticates the working of the “ CREATE TABLE AS SELECT” statement. Here is the verification snippet: SELECT * FROM author_information The output snippet indicates that the CREATE TABLE AS SELECT Statement gets executed successfully. The output shows that the “ author_info” table has been created with the same data as in the “ author_details” table.Įxample 2: How Do I Create a Table Without Data Using the CREATE TABLE AS Statement?Įxecuting the CREATE TABLE AS Statement with the collaboration of the “ WITH NO DATA” clause will copy only the table’s structure(without any data). Let’s execute the SELECT * command to see the newly created table: SELECT * FROM author_info For this purpose, the CREATE TABLE AS statement will be executed as follows: CREATE TABLE author_info AS Let's say we want to create a table named " author_info" with the same columns and data as " author_details". We have already created a table named “author_details” that has the following structure: SELECT * FROM author_details Note: If the user wants a table with a different name, they can specify different table columns after the new table name.Įxample 1: How Do I Create a Table via CREATE TABLE AS Statement? WHERE is an optional clause used to specify a specific condition/criteria. Col_list represents the existing table's columns based on which a new table will be defined/created. ![]() In the above snippet, new_tab represents the table name to be created. Follow the below syntax to avail the functionality of the Postgres’ CREATE TABLE AS statement: CREATE TABLE new_tab AS It creates the table based on the result-set retrieved by the SELECT query. In Postgres, the CREATE TABLE AS statement allows us to create a table from an existing one. How Do I Create a Table Via CREATE TABLE AS SELECT Statement in Postgres? ![]()
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