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SHOW-DATABASES

SHOW-DATABASES​

Name​

SHOW DATABASES

Description​

This statement is used to display the currently visible db

grammar:

SHOW DATABASES [FROM catalog] [filter expr];

illustrate:

  1. SHOW DATABASES will get all database names from current catalog.
  2. SHOW DATABASES FROM catalog will all database names from the catalog named 'catalog'.
  3. SHOW DATABASES filter_expr will get filtered database names from current catalog.
  4. SHOW DATABASES FROM catalog filter_expr is not support yet.

Example​

  1. Display all the database names from current catalog.

    SHOW DATABASES;
    +--------------------+
    | Database |
    +--------------------+
    | test |
    | information_schema |
    +--------------------+
  2. Display all database names from the catalog named 'hms_catalog'.

    SHOW DATABASES from hms_catalog;
    +---------------+
    | Database |
    +---------------+
    | default |
    | tpch |
    +---------------+
  3. Display the filtered database names from current catalog with the expr 'like'.

    SHOW DATABASES like 'infor%';
    +--------------------+
    | Database |
    +--------------------+
    | information_schema |
    +--------------------+

Keywords​

SHOW, DATABASES

Best Practice​