COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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SELECT COUNT(*) FROM table ____ name;
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SELECT COUNT ALL(*) FROM table ____ name;
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SELECT ROWS(*) FROM table ____ name;
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All the above
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Detailed explanation-1: -The SQL COUNT() is a function that returns the number of records of the table in the output. This function is used with the SQL SELECT statement.
Detailed explanation-2: -SQL COUNT() function counts the total number of rows present in the database.
Detailed explanation-3: -COUNT() Example Note: NULL values are not counted.
Detailed explanation-4: -In SQL, you can make a database query and use the COUNT function to get the number of rows for a particular group in the table. Here is the basic syntax: SELECT COUNT(column name) FROM table name; COUNT(column name) will not include NULL values as part of the count.
Detailed explanation-5: -The SQL COUNT( ) function is used to return the number of rows in a table.