Your CASE WHEN is somewhat wrong, you need IS to check for NULL
$q = "SELECT username FROM a WHERE username = '$username'"; i want to select both database so i can login using either table a data or table b data,so how to let the engine select * from 2 tables?? Thanks for ur help..
从select中搜索/过滤特定的DataTables列可以通过以下步骤实现: 1. 首先,确保你已经引入了DataTables库,并且已经初始化了一个DataTables表格。 2. 在HTML页...
Select is initialised using theselectoption in the DataTables constructor - a simple booleantruewill enable the feature. Further options can be specified using this option as an object - see the documentation for details. Example: $(document).ready(function(){$('#myTable').DataTable({select:...
DataTable.cs 取得所有DataRow物件的陣列。 C# publicSystem.Data.DataRow[]Select(); 傳回 DataRow[] DataRow物件的陣列。 範例 下列範例會透過Select方法傳回 對象的陣列DataRow。 C# privatevoidGetRows(){// Get the DataTable of a DataSet.DataTable table = DataSet1.Tables["Suppliers"]; DataRow[]...
DataTable.cs 取得所有DataRow物件的陣列。 C# publicSystem.Data.DataRow[]Select(); 傳回 DataRow[] DataRow物件的陣列。 範例 下列範例會透過Select方法傳回 對象的陣列DataRow。 C# privatevoidGetRows(){// Get the DataTable of a DataSet.DataTable table = DataSet1.Tables["Suppliers"]; DataRow[]...
If the data source contains multiple sources of data, use the DataMember property to specify the specific source to bind to the control. For example, if you have a System.Data.DataSet object with multiple tables, you must specify which table to bind to the control with the DataMember ...
Note:GaussDBoptimizes tables with a small volume of data and caches table results in hash tables to improve performance. In this case, indexes are not required. However, if the data volume exceeds the limit specified bywork_mem, the optimization becomes invalid. In this case, you can create...
DataTableExtensions DataTableNewRowEventArgs DataTableNewRowEventHandler DataTableReader DataView DataViewManager DataViewRowState DataViewSetting DataViewSettingCollection DBConcurrencyException DbType DeletedRowInaccessibleException DuplicateNameException
| name1 | name2 | +---+---+ | hello | world | | hi | jack | +---+---+ Subject Written By Posted SELECT data from tables dimaomni dimaomni June 25, 2010 02:55AM Re: SELECT data from tables Barry Galbraith June 25,