查询表达式中的语法错误（缺少运算符）：System.Data.OleDb.OleDbException

Question

我在 MS Access 2016 中发送以下 SQL 查询作为 ASP WebForm 中的字符串：

string showGridViewQuery = "select creditorName, amount, interestRate, interestType, interestCalculationMethod, insertedDate, o.fullName as owner, u.fullName as dataInsertedBy from tbl_savings s left join tbl_users o on ownerID = o.userID left join tbl_users u on dataEnteredByID = u.userID";

当我 运行 时，出现以下错误：

System.Data.OleDb.OleDbException: Syntax error (missing operator) in query expression 'ownerID = o.userID left join tbl_users u on dataEnteredByID = u.userID'.

当执行到以下代码中的showGridViewCommand.ExecuteNonQuery();时：

string connectionString = GetConnString();
OleDbConnection con = new OleDbConnection(connectionString);
con.Open();
string showGridViewQuery = "select creditorName, amount, interestRate, interestType, interestCalculationMethod, insertedDate, o.fullName as owner, u.fullName as dataInsertedBy from tbl_savings s left join tbl_users o on ownerID = o.userID left join tbl_users u on dataEnteredByID = u.userID";
OleDbCommand showGridViewCommand = new OleDbCommand(showGridViewQuery, con);
showGridViewCommand.ExecuteNonQuery();
DataTable dt = new DataTable();
OleDbDataAdapter olda = new OleDbDataAdapter(showGridViewCommand);
olda.Fill(dt);
GridViewSavingsTracker.DataSource = dt;
GridViewSavingsTracker.DataBind();
con.Close();

我在这里错过了什么？

Answer 1

经过多次尝试，我找到了正确的解决方案：

string showGridViewQuery = "select savingsID, creditorName, amount, interestRate, interestType, interestCalculationMethod, insertedDate, o.fullName as owner, u.fullName as dataEnteredBy from ((tbl_savings as s) left join tbl_users as o on s.ownerID = o.userID) left join tbl_users as u on s.dataEnteredByID = u.userID";

我知道 MS Access 不好。但不知道它这么糟糕！