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Introduction to SQL

Introduction to SQL
Which of the following is a SQL aggregate function?

LEN
AVG
LEFT
JOIN

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Introduction to SQL
The SQL statement: SELECT Name, COUNT(*) FROM NAME_TABLE; counts the number of name rows and displays this total in a table with a single row and a single column.

False
True

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Introduction to SQL
The SQL statementSELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL;prints

bc
ab
23
gh

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Introduction to SQL
SQL is a data sublanguage.

True
False

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

ORDER
SORT BY
ORDER BY
SORT

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