在表中插入唯一数据 [英] insert unique data in table

问题描述

cmd.CommandText = "insert into " + table + " values ('" + textBox1.Text + "', '" + textBox2.Text + "') where not exists(select * from " + table + " where character='" + textBox1.Text + "' and entity='" + textBox2.Text + "');";

i想在我的表中插入唯一数据而我是越来越此查询中的错误（其中的语法不正确）...

i want to insert unique data in my table and i'm getting error in this query (Incorrect syntax near where)...

推荐答案

T-SQL不允许在该位置使用where子句。请参阅此处： http://msdn.microsoft.com/de-de/library/ms174335.aspx [ ^ ]



干杯！

T-SQL does not allow for a where clause in that place. See here: http://msdn.microsoft.com/de-de/library/ms174335.aspx[^]

Cheers!

您好，



请尝试以下查询。

Hi,

Try following query.

cmd.CommandText = "if not exists (select * from " + table + " where character='" + textBox1.Text + "' and entity='" + textBox2.Text + "') insert into " + table + " values ('" + textBox1.Text + "', '" + textBox2.Text + "') where not exists";

谢谢，

Bhagyesh

Thanks,
Bhagyesh

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