WebJun 6, 2014 · I have lost of rows in my datatable so loop take 10 to 15 sec to copy data from one column to another column. hypermellow 6-Jun-14 10:12am How are you populating your DataTable? - could you copy the column values as you populate? pareshpbhayani 6-Jun-14 10:45am I am getting datatable from database. Solution 2 foreach (DataRow dr in … WebJun 10, 2011 · This will also work if you want to transfer old value to other column and update the first one: UPDATE table SET columnA = 'new value', columnB = columnA. Like other answer says - don't forget the WHERE clause to update only what's needed. – Carl di Ortus Feb 9, 2024 at 8:45 9
How to copy one column
WebJan 29, 2024 · create table a (id int, v varchar (10)); create table b (id int, v varchar (10)); insert into a select 1, 'a' union all select 2, 'b'; insert into b select 1, null union select 2, null; update b set v = a.v from a where a.id = b.id; Share Improve this answer Follow answered Jan 29, 2024 at 7:25 Adam Tokarski 203 1 5 WebFirst, specify the table name and a list of comma-separated columns inside parentheses after the INSERT INTO clause. Then, put a comma-separated list of values of the corresponding columns inside the parentheses following the VALUES keyword. The number of columns and values must be the same. bryce canyon driving tour map
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WebSay, for example, you needed to just get the dollar amounts and the names and copy them someplace else. If you've got a whole list of these, you might think you'll either have to type this up again, or copy-and-paste each piece of text separately. Au contraire. Trust me, you'll love this trick! More... WebIf you want to copy some value of one column into another column within a table then run following queries : UPDATE `post` SET `column2`=`column1` where `id`!=1 Now your … WebMay 22, 2024 · Method 1: Inserting All Records From One Table Into Another (Non-Duplicated Data) This method will copy all records from table2 into table1. If an auto-incrementing numeric primary key is being used in the tables, it will need to be omitted to avoid conflicts – so the primary key for the records in table2 will be changed in the … bryce canyon fine art photography