如何在现有表中添加非空列，然后在该列中插入值？

Question

how to add not null column in existing table and then insert values in that column ?? in sql...

Answer 1

If you want to add a NOT NULL column you must specify a DEFAULT :

ALTER TABLE YourTable 
    ADD SomeColumn INT NOT NULL 
    CONSTRAINT DF_YourTable_SomeColumn DEFAULT(0);

Other possibility is to add it with NULL , add your data and alter it to NOT NULL later (see ALTER TABLE)

EDIT: Your comment about "how to insert values"...

This depends very much in your needs. If you want to set all rows to the same value it is:

UPDATE YourTable SET SomeColumn=0;