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Introduction to SQL

Introduction to SQL
Which of the following is valid SQL for an Index?

CREATE INDEX ID;
ADD INDEX ID;
REMOVE INDEX ID;
CHANGE INDEX ID;

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Introduction to SQL
SQL is:

a data sublanguage.
an operating system.
a programming language.
a DBMS.

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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
________ was adopted as a national standard by ANSI in 1992.

SQL
Oracle
DBase
Microsoft Access

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Introduction to SQL
The SQL statementSELECT SUBSTR('123456789', INSTR('abcabcabc', 'b'), 4) FROM DUAL;

456789
1234
6789
2345

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Introduction to SQL
There is an equivalent join expression that can be substituted for all subquery expressions.

True
False

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