mysql参数实例用法

本篇内容介绍了“参数实例用法”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

mysql> select *,now() from test.t123;
+----+------+------+---------------------+
| id | name | age  | now()               |
+----+------+------+---------------------+
|  1 | lxd  |   29 | 2016-02-19 16:25:07 |
|  2 | lxd2 |   30 | 2016-02-19 16:25:07 |
|  3 | lxd3 |   40 | 2016-02-19 16:25:07 |
+----+------+------+---------------------+
3 rows in set (0.00 sec)


mysql> show variables like 'long_query_time';
+-----------------+----------+
| Variable_name   | Value    |
+-----------------+----------+
| long_query_time | 1.000000 |
+-----------------+----------+
1 row in set (0.00 sec)


mysql> select @@global.log_queries_not_using_indexes;
+----------------------------------------+
| @@global.log_queries_not_using_indexes |
+----------------------------------------+
|                                      1 |
+----------------------------------------+
1 row in set (0.00 sec)


mysql> 

# Time: 160219 16:25:07
# User@Host: root[root] @ localhost []  Id:     4
# Query_time: 0.000242  Lock_time: 0.000128 Rows_sent: 3  Rows_examined: 3
SET timestamp=1455870307;
select *,now() from test.t123;