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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; 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 partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Warning 1681 'EXTENDED' is deprecated and will be removed in a future release. Note 1003 /* select#1 */ 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` 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 partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Warning 1681 'EXTENDED' is deprecated and will be removed in a future release. Note 1003 /* select#1 */ 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); 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 drop table t1, t2;