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【单选题】query
A．n.软件
B．系统公用事业
C．n.查询
D．n.装载量,工作量,负载vt.装载,vi.装货
参考答案和解析
ABCD
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考题
You define a multiple－row subquery in the WHERE clause of an SQL query with a comparison operator "=". What happens when the main query is executed? ()
A. The main query executes with the first value returned by the subquery.B. The main query executes with the last value returned by the subquery.C. The main query executes with all the values returned by the subquery.D. The main query fails because the multiple-row subquery cannot be used with the comparison operator.E. You cannot define a multiple-row subquery in the WHERE clause of a SQL query.
考题
A general purpose MySQL instance is configured with the following options:—log-slow-queries—long-query-time=,0001—log-slow-admin-queries—general-log—log-bin—binlog-format=STATEMENT—innodb-flush-log-at-trx-commit=1Which three statements are true（）。A.The General Query Log records more data than the Binary LogB.The binary Log records more data than the General Query LogC.The Slow Query Log records more data than the General Query LogD.The General Query Log records more data than the Slow Query LogE.The Slow Query Log records more data than the Binary LogF.The Binary Log records more data than the Slow Query Log
考题
Examine the data from the ORDERS and CUSTOMERS tables.Evaluate the SQL statement:What is the result when the query is executed?()
A.B.C.D. The query fails because the subquery returns more than one row.E. The query fails because the outer query and the inner query are using different tables.
考题
在Visual FoxPro中，要运行查询文件query1.qpr，可以使用命令A．DO query1B．DO query1.qprC．DO QUERY query1D．RUN query1
考题
SQL是 ______的缩写。A．Standard Query LanguageB．Structured Query LanguageC．Select Query LanguageD．以上都不是
考题
What is true regarding subqueries?（）A、The inner query always sorts the results of the outer queryB、The outer query always sorts the results of the inner queryC、The outer query must return a value to the outer queryD、The inner query returns a value to the outer queryE、The inner query must always return a value or the outer query will give an error
考题
SQL是那几个英文单词的缩写（）A、Standard Query LanguageB、Structured Query LanguageC、Select Query LanguageD、以上都不是
考题
SQL是（）英文单词的缩写。A、Structured Query LanguageB、Standard Query LanguageC、Select Query LanguageD、以上都不是
考题
关系数据库标准语言SQL是哪一项的缩写形式？（）A、Structured Query LanguageB、Standard Query LanguageC、Selected Query LanguageD、Seeking Query Language
考题
You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".What happens when the main query is executed?（）A、The main query executes with the first value returned by the subquery.B、The main query executes with the last value returned by the subquery.C、The main query executes with all the values returned by the subquery.D、The main query fails because the multiple-row subquery cannot be used with the comparison operator.E、You cannot define a multiple-row subquery in the WHERE clause of a SQL query.
考题
What is true regarding subqueries?（）A、The inner query always sorts the results of the outer query.B、The outer query always sorts the results of the inner query.C、The outer query must return a value to the inner query.D、The inner query returns a value to the outer query.E、The inner query must always return a value or the outer query will give an error.
考题
Which MySQL utility program should you to process and sort the slow Query log based on query time or average query time?（）A、MysqlaccessB、MysqldumpC、MysqlshowD、MysqlslowE、Mysqldumpslow
考题
多选题Which two statements are true regarding the execution of the correlated subqueries？（）AThe nested query executes after the outer query returns the row.BThe nested query executes first and then the outer query executes.CThe outer query executes only once for the result returned by the inner query.DEach row returned by the outer query is evaluated for the results returned by the inner query.
考题
单选题关系数据库标准语言SQL是哪一项的缩写形式？（）A
Structured Query LanguageB
Standard Query LanguageC
Selected Query LanguageD
Seeking Query Language
考题
单选题在Visua1 FoxPro中，要运行查询文件query1.QPR，可以使用命令（ ）。A
DO query1B
DO query1.QPRC
DO QUERY query1.qprD
RUN query1
考题
单选题What is true regarding subqueries?（）A
The inner query always sorts the results of the outer queryB
The outer query always sorts the results of the inner queryC
The outer query must return a value to the outer queryD
The inner query returns a value to the outer queryE
The inner query must always return a value or the outer query will give an error
考题
多选题A general purpose MySQL instance is configured with the following options: —log-slow-queries —long-query-time=,0001 —log-slow-admin-queries —general-log —log-bin —binlog-format=STATEMENT —innodb-flush-log-at-trx-commit=1 Which three statements are true（）。AThe General Query Log records more data than the Binary LogBThe binary Log records more data than the General Query LogCThe Slow Query Log records more data than the General Query LogDThe General Query Log records more data than the Slow Query LogEThe Slow Query Log records more data than the Binary LogFThe Binary Log records more data than the Slow Query Log
考题
单选题Which of the following statements best describes Flashback Versions Query？（）A
Flashback Versions Query is used to make changes to multiple versions of data that existed between two points in time.B
Flashback Versions Query is used to view all version changes on rows that existed between the time the query was executed and a point in time in the past.C
Flashback Versions Query is used to view version changes and the SQL to undo those changes on rows that existed between two points in time.D
Flashback Versions Query is used to view all version changes on rows that existed between two points in time.
考题
单选题SQL是那几个英文单词的缩写（）A
Standard Query LanguageB
Structured Query LanguageC
Select Query LanguageD
以上都不是
考题
单选题Which MySQL utility program should you to process and sort the slow Query log based on query time or average query time?（）A
MysqlaccessB
MysqldumpC
MysqlshowD
MysqlslowE
Mysqldumpslow
考题
单选题SQL是哪几个英语单词的缩写（）A
Standard Query LanguageB
Structured Query LanguageC
Select Query LanguageD
其他三项都不是
考题
单选题LPAR1 is configured to have the same 2 LUNs virtualized by a redundant pair of VIO servers. Which command will validate that both storage paths are available？（）A
lspathB
sdd query adapterC
pcmpath query adapterD
datapath query device
考题
单选题You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".What happens when the main query is executed?（）A
The main query executes with the first value returned by the subquery.B
The main query executes with the last value returned by the subquery.C
The main query executes with all the values returned by the subquery.D
The main query fails because the multiple-row subquery cannot be used with the comparison operator.E
You cannot define a multiple-row subquery in the WHERE clause of a SQL query.
考题
单选题Which is an example of a dynamic SELECT statement? （）A
A query whose object names change during its execution. B
A query whose object names are not known until run time. C
A query whose bind variables values change during execution. D
A query whose bind variable values are not known until run time.
考题
单选题What is true regarding subqueries?（）A
The inner query always sorts the results of the outer query.B
The outer query always sorts the results of the inner query.C
The outer query must return a value to the inner query.D
The inner query returns a value to the outer query.E
The inner query must always return a value or the outer query will give an error.
考题
单选题EXHIBIT, Emp Table Exhibit A Exhibit B Examine the data from the EMP table. Evaluate this SQL statement: SELECT * FROM emp WHERE emp _ id = 3); WHERE commission = (SELECT commission FROM emp What is the result when the query is executed?（）A
Exhibit AB
Exhibit BC
The query returns no rowsD
The query fails because the outer query is retrieving more than one columnE
The query fails because both the inner and outer queries are retrieving data from the same table.
考题
单选题关于mysql_db_query与mysql_query说法正确的是：（）A
mysql_db_query与mysql_query在执行sql语句后的返回值是一样的，成功返回资源号，失败返回FALSEB
不能用mysql_query函数临时在另一个数据库上执行sql语句，而mysql_db_query可以C
mysql_db_query不会切换回先前连接到的数据库D
mysql_query在功能上等于mysql_select_db（）+mysql_db_query（）
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