＃1062 - 重复输入''用于键'主'

Question

Table 1 - leads
column 1 - lead_source_description

Table 2 - leads_cstm
column 2 -referrer_c 

我正在尝试使用以下查询将值从table2.column2复制到table1.column1

INSERT INTO leads (`lead_source_description`)
SELECT `referrer__c`
FROM leads_cstm

我知道安静是一项简单的任务，并且已经被问到了。但是我收到以下错误。

#1062 - Duplicate entry '' for key 'PRIMARY'

Answer 1

您的“潜在客户”表必须具有自动增量ID值，您需要像这样插入：

INSERT INTO leads (SELECT NULL, table1.column1 , '', ....) // all the column of leads table shoudl be inserted 

Answer 2

INSERT INTO leads (`lead_source_description`)
SELECT DISTINCT `referrer__c` FROM leads_cstm