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In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement?()
- A、Immediately after the SELECT clause
- B、Before the WHERE clause
- C、Before the FROM clause
- D、After the ORDER BY clause
- E、After the WHERE clause
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更多 “In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement?()A、Immediately after the SELECT clauseB、Before the WHERE clauseC、Before the FROM clauseD、After the ORDER BY clauseE、After the WHERE clause” 相关考题
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In which four clauses can a subquery be used? ()
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Which clause would you use in a SELECT statement to limit the display to those employees whose salary is greater then 5000? ()
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In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement? ()
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Exhibit:Examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP BY department_id);Which statement is true?()
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The EMP table contains these columns:You need to display the employees who have not been assigned to any department.You write the SELECT statement:What is true about this SQL statement?()
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Click the Exhibit button and examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP BY department_id);Which statement is true?()A.The SELECT statement is syntactically accurate.B.The SELECT statement does not work because there is no HAVING clause.C.The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.D.The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
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对由SELECT--FROM—WHERE—GROUP--ORDER组成的SQL语句,其在被DBMS处理时,各子句的执行次序为()A.SELECT—FROM—GROUP—WHERE—ORDERB.FROM——SELECT--WHERE——GROUP——ORDERC.FROM——WHERE——GROUP——SELECT——ORDERD.SELECT——FROM——WHERE——GROUP——ORDER
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对由SELECT--FROM—WHERE—GROUP--ORDER组成的SQL语句,其在被DBMS处理时,各子句的执行次序为()A、SELECT—FROM—GROUP—WHERE—ORDERB、FROM--WHERE——GROUP——ORDER——SELECTC、FROM——WHERE——GROUP——SELECT——ORDERD、SELECT——FROM——WHERE——GROUP——ORDER
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Which two statements are true regarding the ORDER BY clause? ()A、The sort is in ascending by order by default.B、The sort is in descending order by default.C、The ORDER BY clause must precede the WHERE clause.D、The ORDER BY clause is executed on the client side.E、The ORDER BY clause comes last in the SELECT statement.F、The ORDER BY clause is executed first in the query execution.
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In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement?()A、Immediately after the SELECT clauseB、Before the WHERE clauseC、Before the FROM clauseD、After the ORDER BY clauseE、After the WHERE clause
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Which clause would you use in a SELECT statement to limit the display to those employees whose salary is greater then 5000?()A、ORDER BY SALARY 5000B、GROUP BY SALARY 5000C、HAVING SALARY 5000D、WHERE SALARY 5000
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Which two statements are true regarding the ORDER BY clause? ()A、It is executed first in the query execution B、It must be the last clause in the SELECT statement C、It cannot be used in a SELECT statement containing a HAVING clauseD、You cannot specify a column name followed by an expression in this clause E、You can specify a combination of numeric positions and column names in this clause
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In which four clauses can a subquery be used? ()A、in the INTO clause of an INSERT statementB、in the FROM clause of a SELECT statementC、in the GROUP BY clause of a SELECT statementD、in the WHERE clause of a SELECT statementE、in the SET clause of an UPDATE statementF、in the VALUES clause of an INSERT statement
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The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? ()A、The SQL statement displays the desired results.B、The column in the WHERE clause should be changed to display the desired results.C、The operator in the WHERE clause should be changed to display the desired results.D、The WHERE clause should be changed to use an outer join to display the desired results.
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Where can subqueries be used?()A、field names in the SELECT statement B、the FROM clause in the SELECT statement C、the HAVING clause in the SELECT statementD、the GROUP BY clause in the SELECT statement E、the WHERE clause in only the SELECT statement F、the WHERE clause in SELECT as well as all DML statements
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单选题Examine the description of the MARKS table: STD_ID NUMBER(4) STUDENT_NAME VARCHAR2(30) SUBJ1 NUMBER(3) SUBJ2 NUMBER(3) SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects. Examine this SELECT statement based on the MARKS table: SELECT subj1+subj2 total_marks, std_id FROM marks WHERE subj1 AVG(subj1) AND subj2 AVG(subj2) ORDER BY total_ marks; What is the result of the SELECT statement?()A
The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.B
The statement returns an error at the SELECT clause.C
The statement returns an error at the WHERE clause.D
The statement returns an error at the ORDER BY clause.
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多选题Which two statements are true regarding the ORDER BY clause? ()AThe sort is in ascending by order by default.BThe sort is in descending order by default.CThe ORDER BY clause must precede the WHERE clause.DThe ORDER BY clause is executed on the client side.EThe ORDER BY clause comes last in the SELECT statement.FThe ORDER BY clause is executed first in the query execution.
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单选题In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement?()A
Immediately after the SELECT clauseB
Before the WHERE clauseC
Before the FROM clauseD
After the ORDER BY clauseE
After the WHERE clause
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多选题Evaluate this SQL statement: SELECT e.emp_name, d.dept_name FROM employees e JOIN departments d USING (department_id) WHERE d.department_id NOT IN (10,40) ORSER BY dept_name; The statement fails when executed. Which change fixes the error?()Aremove the ORDER BY clauseBremove the table alias prefix from the WHERE clauseCremove the table alias from the SELECT clauseDprefix the column in the USING clause with the table aliasEprefix the column in the ORDER BY clause with the table aliasFreplace the condition d.department_id NOT IN (10,40) in the WHERE clause with d.department_id 10 AND d.department_id 40
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单选题The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? ()A
The SQL statement displays the desired results.B
The column in the WHERE clause should be changed to display the desired results.C
The operator in the WHERE clause should be changed to display the desired results.D
The WHERE clause should be changed to use an outer join to display the desired results.
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多选题In which four clauses can a subquery be used? ()Ain the INTO clause of an INSERT statementBin the FROM clause of a SELECT statementCin the GROUP BY clause of a SELECT statementDin the WHERE clause of a SELECT statementEin the SET clause of an UPDATE statementFin the VALUES clause of an INSERT statement
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多选题Where can subqueries be used?()Afield names in the SELECT statementBthe FROM clause in the SELECT statementCthe HAVING clause in the SELECT statementDthe GROUP BY clause in the SELECT statementEthe WHERE clause in only the SELECT statementFthe WHERE clause in SELECT as well as all DML statements
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单选题The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? ()A
The SQL statement displays the desired results.B
The column in the WHERE clause should be changed to display the desired results.C
The operator in the WHERE clause should be changed to display the desired results.D
The WHERE clause should be changed to use an outer join to display the desired results.
考题
单选题Exhibit: Examine the data in the EMPLOYEES table. Examine the subquery: SELECT last_name FROM employees WHERE salary IN (SELECT MAX(salary) FROM employees GROUP BY department_id); Which statement is true?()A
The SELECT statement is syntactically accurate.B
The SELECT statement does not work because there is no HAVING clause.C
The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.D
The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
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