oracle ORA-00936 缺少表达式
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时间：2020-09-19 01:13:12 来源:igfitidea点击:
ORA-00936 missing expression
提问by user1793384
The following statement:
以下声明：
INSERT INTO TABLE1(COL_1,COL2) VALUES(SELECT MAX(COL_1) FROM TABLE1), 'XYZ');
throws the error:
抛出错误：
ERROR at line 1:
ORA-00936: missing expression
at the select clause.
1. The table is empty for now.
2. COL_1 is a primary key intger field.
Can you help me please?
你能帮我吗？
回答by J?cob
Try as
尝试作为
create table TABLE1 (COL_1 number, COL2 varchar2(5));
ALTER TABLE TABLE1
add CONSTRAINT t_pk PRIMARY KEY (col_1);
INSERT INTO TABLE1(COL_1,COL2) VALUES((SELECT nvl(MAX(COL_1),0) FROM TABLE1), 'XYZ');
INSERT INTO TABLE1(COL_1,COL2) VALUES((SELECT nvl(MAX(COL_1+1),0) FROM TABLE1), 'XYZ');
回答by Andriy M
If you want to use the result of a query as a scalar expression, enclose the entire (sub)query in brackets, like this:
如果要将查询结果用作标量表达式，请将整个（子）查询括在方括号中，如下所示：
INSERT INTO TABLE1(COL_1,COL2) VALUES (
(SELECT MAX(COL_1) FROM TABLE1),
'XYZ'
);
On the other hand, you could simply use a different syntax, here:
另一方面，您可以在这里简单地使用不同的语法：
INSERT INTO TABLE1(COL_1,COL2)
SELECT MAX(COL_1), 'XYZ'
FROM TABLE1
group by 'XYZ';
回答by Buzz
remove one extra bracket
移除一个额外的支架
INSERT INTO TABLE1(COL_1,COL2) SELECT MAX(COL_1) , 'XYZ' FROM TABLE1
