更多"SQL的含义是【 】。"的相关试题:
[单项选择]SQL的含义是______。
A. 结构化查询语言
B. 数据定义语言
C. 数据库查询语言
D. 数据库操纵与控制语言
[单项选择]在SQL查询中“GROUP BY”的含义是
A. 选择行条件
B. 对查询进行排序
C. 选择列字段
D. 对查询进行分组
[简答题]存储过程的含义是什么？创建存储过程的SQL语句是什么？
[单项选择]SQL中，“AGE IN(15，35)”短语的正确含义是( )。
A. AGE=15 AND AGE=35
B. AGE=15 OAGE=35
C. AGE＜=35 AND AGE＞=15
D. AGE＜35 AND AGE＞15
[单项选择]在SQL语句中，表达式“工资BETWEEN 1220 AND 1250”的含义是______。
A. 工资＞1220 AND 工资＜1250
B. 工资＞1220 OR 工资＜1250
C. 工资＞=1220 AND 工资＜=1250
D. 工资＞=1220 OR 工资＜=1250
[单项选择]设有关系模式sc (sno，cno，grade)，各属性含义依次为学号、课程号、分数。SQL 语句“SELECT sno，AVG(grade)FROM sc子句”的功能是计算每个学生的平均分数，其中的子句应是（）
A. GROUP BY grade
B. GROUP BY sno
C. ORDER BY grade
D. ORDER BY sno
[单项选择]Which statement correctly describes SQL and /SQL*Plus?（）
A. Both SQL and /SQL*plus allow manipulation of values in the database.
B. /SQL* Plus recognizes SQL satement and sends them to the server; SQL is the Oracle proprietary interface for executing SQL statements.
C. /SQL* Plus language for communicating with the Oracle server to access data; SQL recognizes SQL statements and sends them to the server.
D. /SQL manipulates data and table definition in the database; /SQL* Plus does not allow manipulation of values in the database.
[单项选择]While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?（）
A. It updates the existing SQL profiles with current statistics
B. It makes the statistics information available to GATHER_STATS_JOB
C. It initiates the statistics collection process by running GATHER_STATS_JOB
D. It logs a warning message in the alert log so that the DBA can perform statistics collection manually
[填空题]HACCP的含义是（），GMP的含义是（），SSOP的含义是（），ISO的含义是（）。
