Q. Which operator performs pattern matching?

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Q. What operator tests column for the absence of data?

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Q. Which of the SQL statements is correct?

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Q. The FROM SQL clause is used to...

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Q. Which SQL keyword is used to retrieve only unique values?

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Q. Which SQL keyword is used to retrieve a maximum value?

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Q. What is a view?

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Q. Which of the following SQL commands is used to retrieve data?

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Q. Which of the following is a SQL aggregate function?

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Q. Which SQL statement is used to update data in a database?

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Q. Which SQL statement is used to delete data FROM a database?

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Q. Which SQL keyword is used to sort the result-set?

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Q. The SQL statement
SELECT SUBSTR('123456789', INSTR('abcabcabc', 'b'), 4) FROM DUAL;

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Q. Which of the following group functions ignore NULL values?

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Q. Table Employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.
The SQL statement
SELECT COUNT(*) FROM Employee WHERE SALARY > ANY (SELECT SALARY FROM EMPLOYEE);
prints

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Q. The SQL statement
SELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL;
prints

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Q. The SQL statement
SELECT ROUND(45.926, -1) FROM DUAL;

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Q. Which of the following must be enclosed in double quotes?

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Q. Which of the following command makes the updates performed by the transaction permanent in the database?

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Q. Which command undo all the updates performed by the SQL in the transaction?

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