Question

我有两个CTE，一个是当前时期，另一个是前一个时期。我想创建一个IF语句，将当前的查找ID与之前的查找ID进行比较，如果它们不匹配，我希望它属于＆＃34;转出＆＃34; 。但是，我在创建if语句时出错。任何建议将不胜感激。

;with transfer_current_mc as 
    (
        --Current
        select snapshot_dt, finding_id, mc_clean_name, mc_1_down_clean_name, 'current' as current_col from audit.archer_findings_snapshot 
        where snapshot_dt = @current_snapshot and snapshot_time_granularity= @Snapshot
    ),
transfer_previous_mc as
    (
        --Previous
        select snapshot_dt, finding_id, mc_clean_name, mc_1_down_clean_name,'previous' as previous_col from audit.archer_findings_snapshot 
        where snapshot_dt = @previous_snapshot and snapshot_time_granularity = @Snapshot
    )

select if a.finding_id <> b.finding_id else 'Transfer Out' end 
from transfer_current_mc a inner join transfer_previous_mc b on a.finding_id = b.finding_id

Answer 1

您需要CASE语句，如下所示

select case when a.finding_id <> b.finding_id then some_column 
else 'Transfer Out' end as Calculated_column
from transfer_current_mc a 
inner join transfer_previous_mc b on a.finding_id = b.finding_id

SQL查询与以前和当前ID的if语句进行比较

1 个答案: