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Introduction to SQL

Introduction to SQL
The format SELECT-FROM-WHERE is the fundamental framework of SQL SELECT statements.

True
False

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Introduction to SQL
The result of a SQL SELECT statement is a(n) ________ .

table
form
file
report

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Introduction to SQL
The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs

Hi
FLASE
Nothing
TRUE

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Introduction to SQL
The SQL WHERE clause:

Both A and B are correct.
limits the column data that are returned.
Neither A nor B are correct.
limits the row data are returned.

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Introduction to SQL
How to select all data from student table starting the name from letter 'r'?

SELECT * FROM student WHERE name LIKE '%r%';
SELECT * FROM student WHERE name LIKE 'r%';
SELECT * FROM student WHERE name LIKE '_r%';
SELECT * FROM student WHERE name LIKE '%r';

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Introduction to SQL
Table employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.The SQL statementSELECT COUNT(*) FROM employee WHERE SALARY > ALL (SELECT SALARY FROM EMPLOYEE);prints

10
9
5
0

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