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1
by brian
clean slate |
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select 1+1,1-1,1+1*2,8/5,8%5,mod(8,5),mod(8,5)|0,-(1+1)*-2;
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1+1 1-1 1+1*2 8/5 8%5 mod(8,5) mod(8,5)|0 -(1+1)*-2
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3 |
2 0 3 1.6000 3 3 3 4
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explain extended select 1+1,1-1,1+1*2,8/5,8%5,mod(8,5),mod(8,5)|0,-(1+1)*-2;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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7 |
Warnings:
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Note 1003 select (1 + 1) AS "1+1",(1 - 1) AS "1-1",(1 + (1 * 2)) AS "1+1*2",(8 / 5) AS "8/5",(8 % 5) AS "8%5",(8 % 5) AS "mod(8,5)",((8 % 5) | 0) AS "mod(8,5)|0",(-((1 + 1)) * -(2)) AS "-(1+1)*-2"
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select 1 | (1+1),5 & 3,bit_count(7) ;
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1 | (1+1) 5 & 3 bit_count(7)
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11 |
3 1 3
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explain extended select 1 | (1+1),5 & 3,bit_count(7) ;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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14 |
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select (1 | (1 + 1)) AS "1 | (1+1)",(5 & 3) AS "5 & 3",bit_count(7) AS "bit_count(7)"
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select 1 << 32,1 << 63, 1 << 64, 4 >> 2, 4 >> 63, 1<< 63 >> 60;
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1 << 32 1 << 63 1 << 64 4 >> 2 4 >> 63 1<< 63 >> 60
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19 |
4294967296 9223372036854775808 0 1 0 8
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select -1 | 0, -1 ^ 0, -1 & 0;
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-1 | 0 -1 ^ 0 -1 & 0
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22 |
18446744073709551615 18446744073709551615 0
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select -1 | 1, -1 ^ 1, -1 & 1;
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-1 | 1 -1 ^ 1 -1 & 1
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25 |
18446744073709551615 18446744073709551614 1
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select 1 | -1, 1 ^ -1, 1 & -1;
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1 | -1 1 ^ -1 1 & -1
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28 |
18446744073709551615 18446744073709551614 1
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select 0 | -1, 0 ^ -1, 0 & -1;
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30 |
0 | -1 0 ^ -1 0 & -1
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31 |
18446744073709551615 18446744073709551615 0
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32 |
select -1 >> 0, -1 << 0;
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33 |
-1 >> 0 -1 << 0
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34 |
18446744073709551615 18446744073709551615
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35 |
select -1 >> 1, -1 << 1;
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36 |
-1 >> 1 -1 << 1
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37 |
9223372036854775807 18446744073709551614
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38 |
drop table if exists t1,t2;
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39 |
create table t1(a int);
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create table t2(a int, b int);
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insert into t1 values (1), (2), (3);
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insert into t2 values (1, 7), (3, 7);
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select t1.a, t2.a, t2.b, bit_count(t2.b) from t1 left join t2 on t1.a=t2.a;
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a a b bit_count(t2.b)
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45 |
1 1 7 3
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46 |
2 NULL NULL NULL
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3 3 7 3
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48 |
drop table t1, t2;
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