为什么我得到 Insert has more target columns than expressions

Question

我有一个名为 source 的简单 table，其中包含 3 列（source_id、名称、tenant_id）和一些数据。我试图通过检查 table 中是否存在数据来将数据插入 table。但是我收到这个错误..知道如何解决

查询 -

INSERT INTO moa.source(source_id, name, tenant_id)
    SELECT ((select max(source_id)+1 from moa.source), 'GE OWS - LHR', 1)
        WHERE NOT EXISTS(SELECT 1 FROM moa.source where name = 'GE OWS - LHR');

错误：

ERROR:  INSERT has more target columns than expressions
LINE 1: INSERT INTO moa.source(source_id, name, tenant_id)
                                          ^
HINT:  The insertion source is a row expression containing the same number of columns expected by the INSERT. Did you accidentally use extra parentheses?
SQL state: 42

Table:

Answer 1

抱歉..我知道了..Select

后应该没有括号

为什么我得到 Insert has more target columns than expressions

Why I am getting Insert has more target columns than expressions

sql

postgresql

sql-insert