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MySQL 5.7 Reference Manual  /  ...  /  Limits on Joins

C.10.1 Limits on Joins

The maximum number of tables that can be referenced in a single join is 61. This includes a join handled by merging derived tables (subqueries) and views in the FROM clause into the outer query block (see Section 9.2.1.18.3, “Optimizing Derived Tables and View References”). It also applies to the number of tables that can be referenced in the definition of a view.


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