Is this faster than say doing multiple updates like複製 using(SqlConnection conn = new SqlConnecion(cs)) { conn.Open(); using(SqlCommand comm = new SqlCommand("UPDATE demoRows SET Status = @Status, Type = @Type, Count = @Count, Event = @Event WHERE ID = @ID",conn)) { foreach(...
http://www.ludou.org/update-multiple-rows-with-different-values-and-a-single-sql-query.html
-- update multiple rows satisfying the conditionUPDATECustomersSETcountry ='NP'WHEREage =22; Run Code Here, the SQL command changes the value of thecountrycolumn toNPifageis22. If there is more than one row whereageequals to22, all the matching rows will be modified. Update all Rows We ...
https://stackoverflow.com/questions/18797608/update-multiple-rows-in-same-query-using-postgresql 问题描述: SQL update fields of one table from fields of another one I have two tables: A [ID, column1, column2, column3] B [ID, column1, column2, column3, column4] A will always be sub...
Row Dennis Math original value is 67 but will be update with the changed value 1st likewise other Rows. (am using c# in wpf)(the original values will be clear like this; so it won't be a problem) i just want to update each row as selected with the changed values; 1st, 2nd etc;...
updates the single row at the current position of the cursor. This can be more accurate than a searched update that uses a WHERE <search_condition> clause to qualify the rows to be updated. A searched update modifies multiple rows when the search condition does not uniquely identify a single...
when a row in a system-period temporal table is deleted. If multiple rows are updated within a single SQL unit of work, the values for the transaction-start-ID column are the same for all the rows and are unique from the values that are generated for the column for another unit of ...
删除的SQL语句 delete from userinfo where ~~~ delete from mail where ~~ delete from article where~~ ~~ 如果没有事务处理,在你删除的过程中,假设出错了,只执行了第一句,那么其后果是难以想象的! 但用事务处理。如果删除出错,你只要rollback就可以取消删除操作(其实是只要你没有commit你就没有确实的执行该...
Filters determine which database rows sqlupdate must update with which data. If multiple database rows match a filter, sqlupdate updates them with the same data. If a single database row matches multiple filters, its final state matches the data corresponding to the last matching filter. ...
publicintUpdate(System.Data.DataRow[] dataRows); 参数 dataRows DataRow[] 用于更新数据源的DataRow对象的数组。 返回 Int32 从DataSet成功更新的行数。 例外 ArgumentNullException DataSet无效。 InvalidOperationException 源表无效。 SystemException