sql server alter column data type code example

Example 1: sql change column types

ALTER TABLE table_name
ALTER COLUMN column_name datatype;

-- Example
ALTER TABLE product
ALTER COLUMN description VARCHAR(250);

Example 2: alter table add column

ALTER TABLE table
ADD COLUMN column VARCHAR (255) NOT NULL AFTER column;

Example 3: sql alter column size

ALTER TABLE table_name
ALTER COLUMN column_name datatype;

Example 4: sql alter type of column

ALTER TABLE TableName
MODIFY COLUMN ColumnName DataType;

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