SQL Server修改列的数据类型

ALTER TABLE LJPA001H
DROP CONSTRAINT DF_LJPA001H_pa_sex_1

ALTER TABLE LJPA001H ALTER COLUMN pa_sex VARCHAR(1)

Original: https://www.cnblogs.com/beichengshiqiao/p/16661587.html
Author: 我是北城石桥
Title: SQL Server修改列的数据类型