Скачать или смотреть 27.MySQL | How to use ALTER QUERY in MySQL in hindi

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In this video, I have explained ALTER QUERY in MySQL

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Keyword / Clause Purpose
ALTER TABLE Initiates a change to a table's structure
ADD COLUMN Adds a new column
DROP COLUMN Removes an existing column
MODIFY COLUMN Changes the datatype or properties of a column
CHANGE COLUMN Renames a column and optionally changes its datatype
RENAME TO Renames a table
ADD INDEX Adds an index to improve performance
DROP INDEX Removes an index
ADD CONSTRAINT Adds a foreign key or unique constraint
DROP CONSTRAINT Removes a constraint


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