The SQL statement displays the desired results.
The column in the WHERE clause should be changed to display the desired results.
The operator in the WHERE clause should be changed to display the desired results.
The WHERE clause should be changed to use an outer join to display the desired results.
第1题:
SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA/_%' ESCAPE '/';
SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA_';
SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA_' ESCAPE /;
SELECT employee_id, last_name, job_id FROM employees WHERE job_id = '%SA_';
第2题:
INSERT INTO employees VALUES (NULL, 'JOHN','Smith');
INSERT INTO employees( first_name, last_name) VALUES ('JOHN','Smith');
INSERT INTO employees VALUES ('1000','JOHN','NULL');
INSERT INTO employees(first_name,last_name, employee_id) VALUES ('1000, 'john','Smith');
INSERT INTO employees (employee_id) VALUES (1000);
INSERT INTO employees (employee_id, first_name, last_name) VALUES ( 1000, 'john',);
第3题:
SELECT last_name, 12*salary* commission_pct FROM emp;
SELECT last_name, 12*salary* (commission_pct,0) FROM emp;
SELECT last_name, 12*salary*(nvl(commission_pct,0)) FROM emp;
SELECT last_name, 12*salary*(decode(commission_pct,0)) FROM emp;
第4题:
The SQL statement displays the desired results.
The column in the WHERE clause should be changed to display the desired results.
The operator in the WHERE clause should be changed to display the desired results.
The WHERE clause should be changed to use an outer join to display the desired results.
第5题:
You have no rows in the table.
You have an employee with the name of James.
You cannot roll back to the same savepoint more than once.
Your last update fails to update any rows because employee ID 180 was already deleted.
第6题:
You have no rows in the table.
You have an employee with the name of James.
You cannot roll back to the same savepoint more than once.
Your last update fails to update any rows because employee ID 180 was already deleted.
第7题:
The SQL statement displays the desired results.
The column in the WHERE clause should be changed to display the desired results.
The operator in the WHERE clause should be changed to display the desired results.
The WHERE clause should be changed to use an outer join to display the desired results.
第8题:
ALTER employee TABLEAL TERCOLUMN(last_name VARCHAR2(35))
ALTER TABLE employee RENAME last_name VARCHAR2(35)
ALTER TABLE employee MODIFY(last_name VARCHAR2(35))
不能增大LAST_NAME列的宽度