错误：“DISTINCT”或其附近的语法错误

Question

为什么会出现此错误？我需要选择这两个区别，但我在这里编码错了吗？

ERROR: syntax error at or near "DISTINCT"

SELECT DISTINCT(mfin_score), DISTINCT(empirica_score ) from account_details

Answer 1

你可以这样做：

select distinct mfin_score, empirica_score
  from account_details

关键字distinct不是函数。这是一个关键字，表示您只需要distinct个结果集上的元组。

Answer 2

DISTINCT是KEYWORD而非FUNCTION，因此如果您尝试

会更好

SELECT DISTINCT mfin_score, empirica_score from account_details

Answer 3

只需使用此

SELECT DISTINCT mfin_score，来自account_details的empirica_score

Answer 4

如果你想要mfin和empirica的独特夫妻：

select distinct mfin_score, empirica_score
  from account_details

如果你想要独特的mfin和独特的经验，你必须做一些不同的事情：

select distinct 'MFIN' As code, mfin_score
 from account_details
union all
select distinct 'EMP' As code, empirica_score
from account_details

您可能需要检查postgresql for Alias的语法，不确定它是否与oracle相同

Answer 5

DISTINCT关键字的正确语法是

SELECT DISTINCT column_name,column_name FROM table_name;

所以你可以写

SELECT DISTINCT mfin_score, empirica_score from account_details

而不是

SELECT DISTINCT(mfin_score), DISTINCT(empirica_score ) from account_details