Most companies keep at least two versions of any database they are using.
Answer: A
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The rows of the result relation produced by a SELECT statement can be sorted, but only by one column.
Answer: B
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SQL provides the AS keyword, which can be used to assign meaningful column names to the results of queries using the SQL built-in functions.
Answer: A
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Which one of the following sorts rows in SQL?
Answer: C
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To define what columns should be displayed in an SQL SELECT statement:
Answer: A
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The basic data type char(n) is a _____ length character string and varchar(n) is _____ length character.
Answer: C
Varchar changes its length accordingly whereas char has a specific length which has to be filled by either letters or spaces .
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The SQL keyword BETWEEN is used:
Answer: A
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The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.
Answer: A
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The command to remove rows from a table 'CUSTOMER' is:
Answer: C
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The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.
Answer: A
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