插入一条数据
INSERT INTO 表名 (字段,字段) VALUES (值，值);
插入多条数据
INSERT INTO 表名 (字段,字段) VALUES (值，值), (值，值)
(SELECT
a.id,
a.NAME,
a.`password`,
b.NAME AS typename
FROM
y_users a
INNER JOIN y_type b ON a.typeid = b.id
ORDER BY
a.id ASC)
UNION ALL
(SELECT
a.id,
a.NAME,
a.`password`,
b.NAME AS typename
FROM
y_users a
INNER JOIN y_type b ON a.typeid = b.id
ORDER BY
a.id ASC)
SELECT
a.id,
a.NAME,
a.`password`,
b.NAME AS typename
FROM
y_users a
INNER JOIN y_type b ON a.typeid = b.id
ORDER BY
a.id ASC limit 0,2
