CREATE TABLE IT1 ( name VARCHAR(64), roll_no INTEGER )
CREATE TABLE IT2 ( name VARCHAR(64), roll_no INTEGER )
CREATE TABLE IT3 ( name VARCHAR(64), roll_no INTEGER )
INSERT INTO IT1 (name, roll_no) VALUES ('aa','13')
INSERT INTO IT2 (name, roll_no) VALUES ('bb','10')
INSERT INTO IT3 (name, roll_no) VALUES ('cc','78')
SELECT *
INTO Student
FROM ( SELECT
IT1.name, IT1.roll_no
FROM IT1
UNION
SELECT
IT2.name,IT2.roll_no
FROM IT2
UNION
SELECT
IT3.name,IT3.roll_no
FROM IT3
) n
ORDER BY roll_no ASC
最佳答案
MySQL 不支持 SELECT ... INTO ...
语法。
您必须使用 INSERT INTO ... SELECT ..
语法来完成此操作。
在这里阅读更多信息.. http://dev.mysql.com/doc/refman/5.0/en/insert-select.html
尝试这样
CREATE TABLE IT1 ( name VARCHAR(64), roll_no INTEGER );
CREATE TABLE IT2 ( name VARCHAR(64), roll_no INTEGER );
CREATE TABLE IT3 ( name VARCHAR(64), roll_no INTEGER );
INSERT INTO IT1 (name, roll_no) VALUES ('aa','13');
INSERT INTO IT2 (name, roll_no) VALUES ('bb','10');
INSERT INTO IT3 (name, roll_no) VALUES ('cc','78');
CREATE table student as SELECT *
FROM
(SELECT IT1.name,
IT1.roll_no
FROM IT1
UNION SELECT IT2.name,
IT2.roll_no
FROM IT2
UNION SELECT IT3.name,
IT3.roll_no
FROM IT3) n
ORDER BY roll_no ASC
<强> FIDDLE DEMO
关于mysql - 错误 1327 未声明的变量 :Student,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23308045/