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81 lines
713 B
Plaintext
81 lines
713 B
Plaintext
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Comment
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t1 0 PRIMARY 1 a NULL NULL NULL NULL
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a b
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2 2
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3 3
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4 4
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a b
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4 4
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a b
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2 2
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3 3
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4 6
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a b
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1 1
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2 2
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3 3
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4 4
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a
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869751
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802616
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a
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869751
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802616
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a
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736494
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a
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736494
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869751
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a
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226312
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736494
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802616
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869751
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table type possible_keys key key_len ref rows Extra
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t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
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x y
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1 3
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1 1
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x y x y
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1 1 1 1
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2 2 2 2
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1 3 1 1
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2 4 2 2
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2 5 2 2
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2 6 2 2
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table type possible_keys key key_len ref rows Extra
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t1 ALL x NULL NULL NULL 6
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t2 eq_ref y y 4 t1.x 1
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max(a)
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1
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a b
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1 6
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1 5
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1 4
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1 3
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1 2
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1 1
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a b
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1 6
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1 5
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1 4
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1 3
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1 2
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1 1
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1 6
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1 5
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1 4
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1 3
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1 2
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1 1
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max(id)
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1
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max(id)
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2
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f1 f2
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16 ted
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12 ted
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12 ted
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12 ted
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12 ted
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