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Creates a temporary Merge table. The table structure is taken from the first table encountered that matches the regular expression.


merge(['db_name',] 'tables_regexp')


  • db_name — Possible values (optional, default is currentDatabase()):

    • database name,
    • constant expression that returns a string with a database name, for example, currentDatabase(),
    • REGEXP(expression), where expression is a regular expression to match the DB names.
  • tables_regexp — A regular expression to match the table names in the specified DB or DBs.

See Also