生成随机数据,如下: --生成随机数据的存储过程DELIMITER//CREATEPROCEDUREGenerateData(INnumINT)BEGINDECLAREiINTDEFAULT0;DECLAREstart_timedatetimeDEFAULT'2000-01-01 00:00:00';DECLAREend_timedatetimeDEFAULT'2024-11-28 23:59:59';WHILEi<=num DOINSERTINTOzkmVALUES(i, FROM_UNIXTIME(FLOOR(RAND()*(UNIX_...
AI代码解释 mysql>create tablet1(->id int primary key auto_increment,->create_time datetimedefaultcurrent_timestamp,->unamevarchar(20),->keyidx_create_time(create_time)->);QueryOK,0rowsaffected(0.02sec)mysql>insert intot1(id)values(null),(null),(null);QueryOK,3rowsaffected(0.01sec)Records:...
-> ); Query OK, 0 rows affected (0.02 sec) mysql>insertintot1(id)values(null),(null),(null); Query OK, 3 rows affected (0.01 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql>insertintot1(id)values(null),(null),(null); Query OK, 3...
mysql> insert into t1(id) values(null),(null),(null); Query OK, 3 rows affected (0.01 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> insert into t1(id) values(null),(null),(null); Query OK, 3 rows affected (0.00 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> select * ...
mysql> insert into t1(id) values(null),(null),(null); Query OK, 3 rows affected (0.00 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> select * from t1; +---+---+---+ | id | create_time | uname | +---+---+---+ | 1 | 2023-...
mysql> insert into t1(id) values(null),(null),(null); Query OK, 3 rows affected (0.01 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> insert into t1(id) values(null),(null),(null); Query OK, 3 rows affected (0.00 sec) ...
在这里，我找到了一个更好的方法来做你想做的事情。使用EnhancedUserType，您可以控制为直接表示对象而...
另外的类似的变量还包括insert_id(用于复制时,AUTO_INCREMENT的取值)等 利用mysqlbinlog你可以看到每个binlog event都有一个时间值。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 # at 441 #121205 10:06:52 server id 5 end_log_pos 526 Query thread_id=5 exec_time=0 error_code=0 ...
mysql> insert into t1(id) values(null),(null),(null); Query OK, 3 rows affected (0.00 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> select * from t1; +---+---+---+ | id | create_time | uname | +---+---+---+ | 1 | 2023-...
Expression: NULL1 row in set (0.00 sec) \G的作用 SHOW TABLE STATUS [FROM db_name] [LIKE 'pattern'] \G: 该命令将输出Mysql数据库管理系统的性能及统计信息 mysql> SHOW TABLE STATUS FROM sql_test; # 显示数据库 RUNOOB 中所有表的信息 ...