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在一栏数与数值之比时插入
原标题:Insert into when number of columns don t match number of values
  • 时间:2010-01-27 10:15:21
  •  标签:
  • mysql
  • insert

我有一句话。

INSERT INTO `table_a` (`col_a`, `col_b`, `col_c`, `col_d`) VALUES
(1, 2, 3, 4),
(2, 1, 6, 9),
(3, 1, 4, 5)

我想在另一个表格中插入这一句,但表一希望插入它的结构与纸面说明(它的领域较少)的结构不同。

table_b has columns  col_a ,  col_b ,  col_d 

我必须做些什么,才能把它列入表_b。 我猜测,这种做法只是无视col价值,只是将它带给一种温和变量,而不是一个领域。

INSERT INTO `table_b` (`col_a`, `col_b`, @temp_var, `col_d`) VALUES
(1, 2, 3, 4),
(2, 1, 6, 9),
(3, 1, 4, 5)
最佳回答

使用临时表格:

CREATE TEMPORARY TABLE myTemp (
col_a integer,
col_b integer,
col_c integer,
col_d integer
);
INSERT INTO myTemp (col_a, col_b, col_c, col_d) VALUES (1, 2, 3, 4), (2, 1, 6, 9), (3, 1, 4, 5);
INSERT INTO table_a (SELECT col_a,col_b,col_d FROM myTemp);

表格一经本届会议结束就消失了(或你可以人工删除)

问题回答

你们如何去除?

INSERT INTO table_b (col_a, col_b, col_d) VALUES (1, 2, 4), (2, 1, 9), (3, 1, 5)




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