select 1 +1 ,1 -1 ,1 +1 *2 ,8 /5 ,8 %5 ,mod(8 ,5 ),mod(8 ,5 )|0 ,-(1 +1 )*-2 ;
1 +1 1 -1 1 +1 *2 8 /5 8 %5 mod(8 ,5 ) mod(8 ,5 )|0 -(1 +1 )*-2
2 0 3 1 .6000 3 3 3 4
explain extended select 1 +1 ,1 -1 ,1 +1 *2 ,8 /5 ,8 %5 ,mod(8 ,5 ),mod(8 ,5 )|0 ,-(1 +1 )*-2 ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
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 MOD 5 AS `8 %5 `,8 MOD 5 AS `mod(8 ,5 )`,8 MOD 5 | 0 AS `mod(8 ,5 )|0 `,-(1 + 1 ) * -2 AS `-(1 +1 )*-2 `
select 1 | (1 +1 ),5 & 3 ,bit_count(7 ) ;
1 | (1 +1 ) 5 & 3 bit_count(7 )
3 1 3
explain extended select 1 | (1 +1 ),5 & 3 ,bit_count(7 ) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select 1 | 1 + 1 AS `1 | (1 +1 )`,5 & 3 AS `5 & 3 `,bit_count(7 ) AS `bit_count(7 )`
select 1 << 32 ,1 << 63 , 1 << 64 , 4 >> 2 , 4 >> 63 , 1 << 63 >> 60 ;
1 << 32 1 << 63 1 << 64 4 >> 2 4 >> 63 1 << 63 >> 60
4294967296 9223372036854775808 0 1 0 8
select -1 | 0 , -1 ^ 0 , -1 & 0 ;
-1 | 0 -1 ^ 0 -1 & 0
18446744073709551615 18446744073709551615 0
select -1 | 1 , -1 ^ 1 , -1 & 1 ;
-1 | 1 -1 ^ 1 -1 & 1
18446744073709551615 18446744073709551614 1
select 1 | -1 , 1 ^ -1 , 1 & -1 ;
1 | -1 1 ^ -1 1 & -1
18446744073709551615 18446744073709551614 1
select 0 | -1 , 0 ^ -1 , 0 & -1 ;
0 | -1 0 ^ -1 0 & -1
18446744073709551615 18446744073709551615 0
select -1 >> 0 , -1 << 0 ;
-1 >> 0 -1 << 0
18446744073709551615 18446744073709551615
select -1 >> 1 , -1 << 1 ;
-1 >> 1 -1 << 1
9223372036854775807 18446744073709551614
drop table if exists t1,t2;
create table t1(a int);
create table t2(a int, b int);
insert into t1 values (1 ), (2 ), (3 );
insert into t2 values (1 , 7 ), (3 , 7 );
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='outer_join_with_cache=off' ;
select t1.a, t2.a, t2.b, bit_count(t2.b) from t1 left join t2 on t1.a=t2.a;
a a b bit_count(t2.b)
1 1 7 3
2 NULL NULL NULL
3 3 7 3
SET optimizer_switch=@save_optimizer_switch;
drop table t1, t2;
Messung V0.5 in Prozent C=59 H=100 G=81
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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