循环遍历众多"如果存在更新,否则插入"语句？

Question

我有一个脚本需要在表中插入50多行,有没有办法循环我要插入的每一行,而不是在TSQL中将此语句编码50次以上？

IFEXISTS ( SELECT 1 FROM table where column 1 = )
    UPDATE table
    Column1 = value,
    Column2 = value,
    Column3 = value,
    Column4 = value
    WHERE column 1 =
    ELSE
    INSERT INTO table
    (Column1, Column2, Column3, Column4)
    VALUES
    (value, value, value, value)

Answer 1

更好的是,您可以将记录放在临时表中,然后更新所有存在的内容并插入两个查询不存在的所有内容.

例:

select Column1 = 1, Column2 = 2, Column3 = 3
into #temp
union all select 1,2,3
union all select 1,2,3
union all select 1,2,3
...
union all select 1,2,3

update t
set Column1 = p.Column1, Column2 = p.Column2, Column3 = p.Column3
from table t
inner join #temp p on p.Column1 = t.Column1

insert into table (Column1, Column2, Column3)
select p.Column1, p.Column2, p.Column3
from #temp p
left join table t on t.Column1 = p.Column1
where t.Column1 is null

drop table #temp