sql - SQL DELETE 语句语法

Question

尝试执行删除查询并收到以下错误

查询表达式“cname VALUES @cname”中有语法错误（缺少运算符）。

代码

Dim conn As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & My.Settings.strFileName)
conn.Open()
Dim cmdText = "DELETE FROM products WHERE cname VALUES @cname"
Dim cmd As OleDbCommand = New OleDbCommand(cmdText, conn)
With cmd.Parameters
  .Add(New OleDbParameter("@cname", DataGridView1.Item("cname", i).Value))
End With
Dim dt As New DataTable("products")
cmd.ExecuteNonQuery()
conn.Close()
conn = Nothing

Answer 1

你需要一个接线员

DELETE FROM products WHERE cname = @cname

Answer 2

您编写删除语句的方式不正确。

你应该这样写：

Dim cmdText = "DELETE FROM products WHERE cname = @cname"

Answer 3

并且delete all要从具有特定 的表中记录ID，您只需；

deleteMore:
DELETE TOP(100) TableName WHERE toDelete='17'
IF @@ROWCOUNT != 0
    goto deleteMore:

这将删除前 100 条记录，并重复删除，直到所有记录17都消失。