Answers for "sql update column type"

sql change column types

ALTER TABLE table_name
ALTER COLUMN column_name datatype;

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

sql server alter column

ALTER TABLE table_name 
ALTER COLUMN column_name new_data_type(size);

sql alter type of column

ALTER TABLE TableName
MODIFY COLUMN ColumnName DataType;

alter table add column

ALTER TABLE table_name 
ADD column_name datatype;

T-SQL Alter the column data type

ALTER TABLE dbo.MyTable ALTER COLUMN MyColumn VARCHAR(20) NOT NULL;