The SQL -92 wildcards are ____ and ____ .
A. asterisk (*); percent sign (%)
B. percent sign (%); underscore (_)
C. underscore(_); question mark (?)
D. question mark (?); asterisk (*)
Answer: Option B
Solution (By Examveda Team)
Option A: asterisk (); percent sign (%) - This option is incorrect. While the percent sign (%) is a wildcard character in SQL-92 for matching zero or more characters, the asterisk () is not a wildcard character in SQL.Option B: percent sign (%); underscore () - This option is correct. In SQL-92, the percent sign (%) is used as a wildcard for matching zero or more characters, and the underscore () is used as a wildcard for matching a single character.
Option C: underscore (); question mark (?) - The underscore () is a wildcard character in SQL-92, but the question mark (?) is not a wildcard character in SQL. This option is incorrect.
Option D: question mark (?); asterisk () - The question mark (?) is not a wildcard character in SQL-92, and the asterisk () is not a wildcard character in SQL. This option is incorrect.
Conclusion:
In SQL-92, the wildcards are Option B: percent sign (%) and underscore (_).
This Question Belongs to Database >> Introduction To SQL
You can add a row using SQL in a database with which of the following?
A. ADD
B. CREATE
C. INSERT
D. MAKE
The command to remove rows from a table 'CUSTOMER' is:
A. REMOVE FROM CUSTOMER ...
B. DROP FROM CUSTOMER ...
C. DELETE FROM CUSTOMER WHERE ...
D. UPDATE FROM CUSTOMER ...
A. limits the column data that are returned.
B. limits the row data are returned.
C. Both A and B are correct.
D. Neither A nor B are correct.
Which of the following is the original purpose of SQL?
A. To specify the syntax and semantics of SQL data definition language
B. To specify the syntax and semantics of SQL manipulation language
C. To define the data structures
D. All of the above
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