3
我知道在SQLite中,我們使用LENGTH
函數而不是len
。但是,當我想用LENGTH
功能使用子查詢,像這樣:如果它有一個SQL表達式,如果它有一個帶SUBSELECT查詢的LENGTH函數到SQLite
select length(select name from tblNames where name=1)
我收到一個錯誤。下面是微軟版本的SQL表達式:
iif(len((select BilgiAcik from DigerBilg where BilgTip=12 and BilgDgr=Cstr(Dr.Fr)))>0,(select BilgiAcik from DigerBilg where BilgTip=12 and BilgDgr=Cstr(Dr.Fr)),Cstr(Dr.Fr)) as Fr,
我轉換了上述表達式爲SQLite作爲這樣:
(case length((select BilgiAcik from DigerBilg where BilgTip=12 and BilgDgr=CAST(Dr.Fr as TEXT))>0 (select BilgiAcik from DigerBilg where BilgTip=12 and BilgDgr=Cstr(Dr.Fr)) else CAST(Dr.Fr as TEXT) end) as Fr,
什麼,我做錯了什麼?我不能只使用SUBSELECT
查詢與LRNGTH
函數?有關如何解決此問題的任何建議?
非常感謝你 –