Mysql Ó Ö» Ö®BTree Functions

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A where c1 = x and c2 = x and c4> x and c3 = x
B where c1 = x and c2 = x and c4 = x order by c3
C where c1 = x and c4 = x group by c3, c2
D where c1 =? And c5 =? Order by c2, c3
E where c1 =? And c2 =? And c5 =? Order by c2, c3

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OK?

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insert into t values('a1','a2','a3','a4','a5'),('b1','b2','b3','b4','b5');

2. ~~~~~~~£°

insert into t values('a1','a2','a3','a4','a5'),('b1','b2','b3','b4','b5');

Guímāóró ÷ {£°

alter table t add index c1234(c1,c2,c3,c4);

Please refer to the following documents for more information:

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