How to Find Tables with a Specific Column in PostgreSQL?

Finding Tables with Specific Columns in PostgreSQL

In PostgreSQL, it is often necessary to locate tables that contain a particular column. Multiple methods can be used to achieve this:

Using information_schema.columns Table:

The information_schema.columns table provides information about all columns in the database. You can use this table to query for tables that have a specific column. The syntax is:

SELECT table_name
FROM information_schema.columns
WHERE column_name = 'your_column_name';

Using d Command:

The d command can also be used to find tables with a specific column. The syntax is:

\d+ table_pattern column_pattern

For example, to find all tables that have a column named "username", you would use the following command:

\d+ % username

Using pg_dump:

The pg_dump utility can be used to extract the schema of all tables in the database, including column information. The following command would generate a list of all tables that have a column named "username":

pg_dump -s --column=username

Using an Alternative Query:

An alternative query can also be used to find tables with a specific column:

SELECT table_name
FROM information_schema.columns
WHERE column_name = 'your_column_name';

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