copy data to other table in sql using button C#

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hi i have a database in sql server 2005
i have one table called "main_table", it has number of data of students
i have another table of same design, in same database, it is called "student_table"

i want, when i click a button in c#, the data from "main_table" would be copy to "student_table" with a condition "where year= 2005 (or any i specify)"

i have further results to calculate from "students_table" so i need that data, not all the data

can anyone help

Posted 26-Aug-11 21:20pm

Db issues

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Abhinav S · Answer 1 · 2011-08-26T21:36:00

Solution 2

You can have a look at Insert Into with Select option.

e.g.

SQL

INSERT INTO Table1 (A, B)
SELECT A,B
FROM Table2
WHERE column > [condition]

More details here[^].

Posted 26-Aug-11 21:36pm

Abhinav S

Comments

OriginalGriff 27-Aug-11 3:41am

The only thing I really don't like about that is the effect in a multiuser environment...

OriginalGriff · Answer 2 · 2011-08-26T21:37:00

Why create another table, which holds the results? Instead, pass the results of a query to another query (this is called Nested Queries) http://www.sql-tutorial.com/sql-nested-queries-sql-tutorial/[^]

[edit]One of the reasons not to do what you propose is that it won't work at all in a multiuser environment: Who last put the data into the table? Was it you? Or someone half the world away? You don't know, and you can't assume it was you.

If you must put it into a table, then look at Temporary Tables, and do it in a stored procedure.

But by preference, don't do it at all, unless you really have to.[/edit]

RaisKazi · Answer 3 · 2011-08-26T21:47:00

Solution 4

You can use SQL query as below for insertion.

INSERT INTO student_table(Col1,Col2,Col3) SELECT Col1,Col2,Col3 FROM main_table where year= 2005;

And have a look at below link for Ado.Net Data Insertion.

http://csharp.net-informations.com/data-providers/csharp-sqlcommand-executenonquery.htm[^]

Posted 26-Aug-11 21:47pm

RaisKazi

Comments

Db issues 29-Aug-11 0:42am

Thanks

hitech_s · Answer 4 · 2011-08-26T21:30:00

Solution 1

query u need to write in button click event
INSERT INTO student table (column names)SELECT (column names ) FROM maintable where condition

Posted 26-Aug-11 21:30pm

hitech_s

Updated 26-Aug-11 21:37pm

v3