如何从同一 table 中获取两列不重复的数据

Question

select DISTINCT column1, (select DISTINCT column2 from table1 ) from table1

我想要 column1 和 column2 的值不重复

Answer 1

select distinct column1
               ,column2
from table1

Answer 2

如果你只有很少的重复，那么

SELECT DISTINCT Column1, Column2 from table1

如果有很多重复，那么

SELECT Column1, Column2 from table1 GROUP BY Column1, Column2

Answer 3

SELECT DISTINCT value FROM Table1 CROSS APPLY ( VALUES ('COLUMN1', Column1), ('COLUMN2', Column2) ) c(col, value) WHERE value IS NOT NULL

Answer 4

select 与表 1 不同的列 1、列 2；

How to get data without duplicates for two columns from the same table