在Firebird存儲過程中選擇標量值

Question

我想要從Firebird 2.1存儲過程中獲取特定行的ID。我似乎無法記住語法，而且這讓我感到非常緊張。

這是代碼在Microsoft SQL Server使用的TSQL中的外觀。

@ID = SELECT ID FROM ADDRESS WHERE 
     POBox = :POBOX AND 
     ExtendedAddress = :EXTENDEDADDRESS AND 
     StreetAddress = :STREETADDRESS AND 
     Locality = :LOCALITY AND 
     Region = :REGION AND 
     PostalCode = :POSTALCODE AND 
     CountryName = :COUNTRYNAME; 

什麼是火鳥等值？

UPDATE：本Firebird SQL migration guide認爲，這應該工作

SELECT ID INTO :ID FROM ADDRESS WHERE 
     POBox = :POBOX AND 
     ExtendedAddress = :EXTENDEDADDRESS AND 
     StreetAddress = :STREETADDRESS AND 
     Locality = :LOCALITY AND 
     Region = :REGION AND 
     PostalCode = :POSTALCODE AND 
     CountryName = :COUNTRYNAME; 

但是我想，出現語法錯誤「變成了」當我嘗試創建存儲過程。

Answer 1

顯然，Firebird遷移指南是錯誤的。這句法工作對我來說：

SELECT ID FROM ADDRESS WHERE 
    POBox = :POBOX AND 
    ExtendedAddress = :EXTENDEDADDRESS AND 
    StreetAddress = :STREETADDRESS AND 
    Locality = :LOCALITY AND 
    Region = :REGION AND 
    PostalCode = :POSTALCODE AND 
    CountryName = :COUNTRYNAME 
INTO :ID; 

注意，INTO條款一定要來後的FROM和WHERE條款。