sqlserver查询空口令用户需要执行的sql语句为()
A. Select name.Password from syslogins where password is null order by name
B. Select name.Password from syslogins where password is none order by name,Password
C. Select name.Password from syslogins where password=null order by name,Password
D. Select name.Password from syslogins where password=none order by name
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ciso交换机配置console口密码的命令是:()
A. line console 0 password cisco
B. line console password cisco
C. line console cisco
D. line console 0 passwd cisco
在mysql中备份表正确的语句为()
A. select * into table2 from table1
B. create table table2 as (select * from database..table1)
CREATE TABLE tb_cab_bak LIKE tb_cab;INSERT INTO tb_cab_bak SELECT * FROM tb_cab;
D. mysqldump -h主机名 -P端口 -u用户名 -p密码 –database 数据库名 > 文件名.sql
一个Hardware运行WLS8.1,JVM1.4.1,你观察到系统性能下降,发现某公司由于业务需求,购置一套设备并且部署了一个Hardware软件,并运行WLS8.1,JVM1.4.1,但是在运行过程中出现以下问题。有连接不到server的连接,日志没有异常,cpu正常,()可以提升系统性能()
A. 增加thread count
B. 增加heap size
C. 增加backlog
D. 增加JDBC最大连接数