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merge Table Function

Creates a temporary Merge table. The structure will be derived from underlying tables by using a union of their columns and by deriving common types.

Syntax

Arguments

  • 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