一次添加新列后如何在表中插入值？

Question

I have a mysql table. I have inserted a new column namely s_no (integer) at first position. Now I want to insert values from 1, 2, 3 at once and also want to make it primary key.

Answer 1

To make it primary key:

ALTER TABLE tableName
  ADD PRIMARY KEY (s_no);

Read more at:

http://www.mysqltutorial.org/mysql-primary-key/

To insert rows:

INSERT INTO tableName
    (a,b,c)
VALUES
    (1,2,3),
    (4,5,6),
    (7,8,9);  

INSERT statements that use VALUES syntax can insert multiple rows. To do this, include multiple lists of column values, each enclosed within parentheses and separated by commas.

Read more at:

http://dev.mysql.com/doc/refman/5.5/en/insert.html