<

Description

The < operator returns true only if the left-hand operand is less than the right-hand operand.

Syntax

  1. > SELECT x < y;

Examples

  1. mysql> SELECT 2 < 2;
  2. +-------+
  3. | 2 < 2 |
  4. +-------+
  5. | false |
  6. +-------+
  7. 1 row in set (0.00 sec)
  1. create table t1 (spID smallint,userID bigint,score int);
  2. insert into t1 values (1,1,1);
  3. insert into t1 values (2,2,2);
  4. insert into t1 values (2,1,4);
  5. insert into t1 values (3,3,3);
  6. insert into t1 values (1,1,5);
  7. insert into t1 values (4,6,10);
  8. insert into t1 values (5,11,99);
  10. mysql> select spID,userID,score from t1 where (userID-1)<spID;
  11. +------+--------+-------+
  12. | spid | userid | score |
  13. +------+--------+-------+
  14. |    1 |      1 |     1 |
  15. |    2 |      2 |     2 |
  16. |    2 |      1 |     4 |
  17. |    3 |      3 |     3 |
  18. |    1 |      1 |     5 |
  19. +------+--------+-------+
  20. 5 rows in set (0.00 sec)
  21. mysql> select spID,userID,score from t1 where spID<(userID-1);
  22. +------+--------+-------+
  23. | spid | userid | score |
  24. +------+--------+-------+
  25. |    4 |      6 |    10 |
  26. |    5 |     11 |    99 |
  27. +------+--------+-------+
  28. 2 rows in set (0.00 sec)