mysql中的运算符
mysql> select ~1;
+----------------------+
| ~1 |
+----------------------+
| 18446744073709551614 |
+----------------------+
1 row in set (0.00 sec)
mysql> select ~1,~18446744073709551614;
+----------------------+-----------------------+
| ~1 | ~18446744073709551614 |
+----------------------+-----------------------+
| 18446744073709551614 | 1 |
+----------------------+-----------------------+
1 row in set (0.00 sec)
mysql> select bin(18446744073709551614);
+------------------------------------------------------------------+
| bin(18446744073709551614) |
+------------------------------------------------------------------+
| 1111111111111111111111111111111111111111111111111111111111111110 |
+------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> select 100>>3;
+--------+
| 100>>3 |
+--------+
| 12 |
+--------+
1 row in set (0.00 sec)
mysql> select 100<<3;
+--------+
| 100<<3 |
+--------+
| 800 |
+--------+
1 row in set (0.00 sec)
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