No, because you have no WHERE condition. wangxu wrote: > sql: > > SELECT * > FROM table_one INNER JOIN table_one table_one1 ON table_one1.column_one = > table_one.column_two > INNER JOIN table_one table_one2 ON table_one2.column_one = > table_one.column_three > > > explain: > > *************************** 1. row *************************** > id: 1 > select_type: SIMPLE > table: table_one > type: ALL > possible_keys: idx_column_two,idx_column_three > key: NULL > key_len: NULL > ref: NULL > rows: 2037 > Extra: > *************************** 2. row *************************** > id: 1 > select_type: SIMPLE > table: table_one1 > type: ref > possible_keys: idx_column_one > key: idx_column_one > key_len: 5 > ref: table_one.column_two > rows: 1 > Extra: Using where > *************************** 3. row *************************** > id: 1 > select_type: SIMPLE > table: table_one2 > type: ref > possible_keys: idx_column_one > key: idx_column_one > key_len: 5 > ref: table_one.column_three > rows: 1 > Extra: Using where > > Can I optimize this "ALL" on table one? > thanks! > >
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