[英]Why am I getting this syntax logic error?
我有一個連接和顯示數據庫的基本 Windows Forms 應用程序。 我想使用兩個表中的信息更新其中一個數據庫,
UPDATE account AS a
SET accrued = (a.accrued + ((p.intrate/365)*balance))
FROM customer c JOIN product p
ON p.prodid = a.prodid
WHERE c.custid = a.custid AND active = 1
這適用於數據庫瀏覽器
using (SQLiteCommand cmd = connAccount.CreateCommand())
{
// adds customers details to the database
cmd.CommandText = @"UPDATE account AS a SET accrued = (a.accrued + ((p.intrate / 365) * balance)) FROM customer c JOIN product p ON p.prodid = a.prodid WHERE c.custid = a.custid AND active = 1";
cmd.ExecuteNonQuery();
MessageBox.Show("Daily Accrued Updated");
}
在我的應用程序中給了我錯誤:
System.Data.SQLite.SQLiteException:'“FROM”附近的 SQL 邏輯錯誤:語法錯誤'
早於 3.33.0 的 SQLite 版本不支持代碼中的UPDATE...FROM
語句的語法。
您可以將舊語法與相關子查詢一起使用:
UPDATE account AS a
SET accrued = a.accrued +
(SELECT p.intrate/365
FROM customer c JOIN product p
ON p.prodid = a.prodid
WHERE c.custid = a.custid) * a.balance
WHERE a.active = 1
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