COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The AS SQL clause is used to change the name of a column in the result set or to assign a name to a derived column
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The AS clause is used with the JOIN clause only
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The AS clause defines a search condition
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All of the mentioned
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Detailed explanation-1: -We use the AS clause in SQL to give a new name to a column or a table in a database. This name is known as an alias, and it is used to make the column or table name more readable. The alias exists only for the duration of the query.
Detailed explanation-2: -The AS command is used to rename a column or table with an alias. An alias only exists for the duration of the query.
Detailed explanation-3: -1 Answer. Easiest explanation: SQL Aliases are defined for columns and tables. Basically aliases are created to make the column selected more readable.
Detailed explanation-4: -The AS clause allows you to give an alias name to EQL attributes and results. The alias name can be given to an attribute, attribute list, expression result, or query result set. The aliased name is temporary, as it does not persist across different EQL queries.
Detailed explanation-5: -The most common ways that are supported by MySQL, Oracle, PostgreSQL, and MariaDB are to use the ALTER command using the RENAME command and the ALTER command using the CHANGE COLUMN command. To change a column name in SQL Server sp rename command is used, and here ALTER command cannot be used.