從select中的子查詢生成的別名字段

Question

我有一個這樣的選擇查詢：

SELECT 
emp_des_company as 'Company', 
(SELECT pav_des_valor FROM slt_pergunta_avaliacao pa, slt_avaliacao a WHERE pa.pav_idn_pergunta = 393 AND c.cas_idn_avaliacao = a.avl_idn_avaliacao)
FROM slt.case
...

我如何像這樣子查詢別名：

SELECT 
emp_des_company as 'Company', 
(SELECT pav_des_valor FROM slt_pergunta_avaliacao pa, slt_avaliacao a WHERE pa.pav_idn_pergunta = 393 AND c.cas_idn_avaliacao = a.avl_idn_avaliacao) as (SELECT per_des_descricao WHERE per_idn_pergunta = 393) 
FROM slt.case
...

提前致謝。

Answer 1

您不能簡單地將動態值用於靜態SQL中的列別名。 您將不得不使用固定值： AS column_name

一種可能的選擇是動態創建查詢，查看准備好的語句 。