COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How do we select all rows for the “Designer” table?
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SELECT * FROM Designer
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SELECT [All] FROM Designer
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SELECT Designer.*
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SELECT FROM Designer
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Explanation:
Detailed explanation-1: -SELECT * FROM <TableName>; This SQL query will select all columns and all rows from the table. For example: SELECT * FROM [Person].
Detailed explanation-2: -COUNT(*) with GROUP BY returns the number of rows in each group. This includes NULL values and duplicates. COUNT(ALL <expression>) evaluates expression for each row in a group, and returns the number of nonnull values.
Detailed explanation-3: -The asterisk tells the database to select all data in the table.
Detailed explanation-4: -MySQL SELECT specific rows When a user wants to retrieve some individual rows from a table, a WHERE clause has to be added with the SELECT statement immediately followed by a condition. Here * indicates all columns.
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