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我有一個查詢在這裏回答SQL Select All Without Values in Another Table。SQL C＃WPF查詢擴展
我剛剛被要求整合來自另一個數據庫的數據。這是我目前所擁有的。
string _loanSubcontractor = TableNames.Default.LoansSubcontractors;
string _loanPacific = TableNames.Default.LoansPacific;
string _tools = TableNames.Default.Tools;
string _selectStatement = " SELECT [Tools].[Type], [Tools].[Brand], [Tools].[Serial], [Tools].[Year], [Tools].[Code] ";
string _groupBy = " GROUP BY [Tools].[Type], [Tools].[Brand], [Tools].[Serial], [Tools].[Year], [Tools].[Code], [Tools].[Working] ";
string _searchItems = " ([Tools].Code LIKE @toolSerial OR [Tools].Serial LIKE @toolSerial) AND ([Tools].[Working] = 'True' OR [Tools].[Working] IS NULL) ";
SqlConnection myConnection = new SqlConnection(Connection.Default.ConnectionString);
//Checks the main tool information
myConnection.Open();
SqlCommand getTool = new SqlCommand(
_selectStatement + "FROM [" + _tools + "] LEFT OUTER JOIN [" + _loanSubcontractor + "] ON " +
_tools + ".code = [" + _loanSubcontractor + "].ToolCode FULL JOIN [" + _loanPacific + "] ON " + _tools + ".Code = " +
_loanPacific + ".ToolCode WHERE [" + _loanSubcontractor + "].ToolCode IS NULL AND [" + _loanPacific + "].ToolCode IS NULL AND (" + _searchItems + ")" +
"UNION " +
_selectStatement + " FROM [" + _loanSubcontractor + "] INNER JOIN " + _tools + " ON " + _tools + ".Code = [" + _loanSubcontractor + "].ToolCode " +
"INNER JOIN " + _loanPacific + " ON " + _loanPacific + ".ToolCode = " + _tools + ".Code " + _groupBy +
"HAVING (COUNT(" + _loanSubcontractor + ".ReturnDate) = COUNT(*) OR COUNT(" + _loanPacific + ".ReturnDate) = COUNT(*)) " +
" AND " + _searchItems, myConnection);
getTool.Parameters.Add("@toolSerial", SqlDbType.NVarChar).Value = "%" + toolSerial + "%";
我有什麼是兩份貸款表（一個爲員工和一個分包商），因爲屬性名稱是不同的數據類型也不同。實質上，我需要檢查該工具是否正常工作，並且該工具沒有被租用到任何一個貸款表中（如返回日期爲null所示）。在任何一個表中都可能有或沒有貸款。
另外，有人可以提供一個鏈接，顯示良好的C＃中的SQL格式化技術？