In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:
A. all columns of the table are to be returned.
B. all records meeting the full criteria are to be returned.
C. all records with even partial criteria met are to be returned.
D. None of the above is correct.
Answer: Option A
Solution (By Examveda Team)
Option A: all columns of the table are to be returned. - According to the SQL-92 standard, using the asterisk () in an SQL SELECT statement querying a single table means that all columns of the table are to be returned.Option B: all records meeting the full criteria are to be returned. - This option is incorrect. The asterisk () refers to columns, not records.
Option C: all records with even partial criteria met are to be returned. - This option is incorrect. The asterisk () does not relate to criteria or records but to columns.
Option D: None of the above is correct. - This option is incorrect because Option A correctly describes the meaning of the asterisk () in SQL-92 standard.
Conclusion:
In SQL-92 standard, using the asterisk (*) in an SQL SELECT statement querying a single table means that all columns of the table are to be returned. Therefore, the correct answer is Option A: all columns of the table are to be returned.
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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