mysql - Mysql CAST(CONCAT_WS が正しい構文を取得しようとしています

Question

これは機能します

SELECT EntryId FROM 2_1_journal 
WHERE CAST(CONCAT_WS('-', RecordYear,RecordMonth,RecordDay) AS DATE) = ? 

ただしWHERE、日付の「仮想」列名を列名などで定義する前に必要ですRecordDate。

試した

SELECT EntryId FROM 2_1_journal 
CAST(CONCAT_WS('-', RecordYear,RecordMonth,RecordDay) AS DATE) RecordDate 
WHERE RecordDate = ?


SELECT EntryId FROM 2_1_journal 
CAST(CONCAT_WS('-', RecordYear,RecordMonth,RecordDay) AS DATE) AS RecordDate 
WHERE RecordDate = ?


SELECT EntryId FROM 2_1_journal 
CAST((CONCAT_WS('-', RecordYear,RecordMonth,RecordDay) AS DATE) AS RecordDate) 
WHERE RecordDate = ?

すべての場合でエラーが発生しますSyntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CAST。

正しい構文を教えてください

Answer 1