How to use 'between'

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Is my code correct with regard to 'between'.

SqlDataAdapter da = new SqlDataAdapter("select * from txfile where exp_date between '"+v_fd+"' and '"+v_td+"'", con);

Thanks.

Posted 23-May-13 21:47pm

S.Rajendran from Coimbatore

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OriginalGriff · Answer 1 · 2013-05-23T21:58:00

No.
Do not concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead.

C#

SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM txfile WHERE exp_date BETWEEN @SD AND @ED, con);
da.SelectComand.Parameters.AddWithValue("@SD", v_fd);
da.SelectComand.Parameters.AddWithValue("@SD", v_td);

BTW: It's also considered a bad practice to use SELECT * - you should list the columns you want to retrieve. It can be very wasteful in memory and bandwidth to return columns you don't need.

Arun Vasu · Answer 2 · 2013-05-23T22:37:00

Solution 2

may i know what error is coming?

exp_date is datetime data type means please remove single quote. its may be help you to get expect result.

select * from tablename where expdate between value1 and value2

Expdate Datatype is Date then Value1 and Value2 Type should also be Date
if Expdate is Integer then it should also be integer to get exact result.

Posted 23-May-13 22:37pm

Arun Vasu

Updated 23-May-13 22:43pm

v3

Comments

S.Rajendran from Coimbatore 24-May-13 5:14am

expdate is varchar(10)