一.MySQL服务的启动和停止 1.net 命令来启动或停止mysql服务 net stop mysql(mysql是指你真正装的服务,如果装的是 mysql5,必须写成 net stop mysql5)net start mysql 2.Mysql启动.停止.重启常用命令(可能需要加上 sudo) A.启动方式(1).使用 service 启动:[root@localhost /]# service mysqld start (5.0版本是mysqld)[root@szxdb etc]# se
LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name.txt' [REPLACE | IGNORE] INTO TABLE tbl_name [FIELDS [TERMINATED BY 'string'] [[OPTIONALLY] ENCLOSED BY 'char'] [ESCAPED BY 'char' ] ] [LINES [STARTING BY 'string'] [TERMINATED BY 'string
1. oracle数据库 SELECT * FROM TABLE1 WHERE ROWNUM<=N 2. Infomix数据库 SELECT FIRST N * FROM TABLE1 3. DB2数据库 SELECT * ROW_NUMBER() OVER(ORDER BY COL1 DESC) AS ROWNUM WHERE ROWNUM<=N 或者 SELECT COLUMN FROM TABLE FETCH FIRST N ROWS ONLY 4. SQL Server数据库 SELE