将客户端的三个值与数据库中的其他三个值进行比较

Question

I am still new in asp programming and i am having difficulty in figuring how to compare the values from client side with the database.

For example, i am going to insert date , starttime and room values into the database but under one condition which they cannot be the same with the date , starttime and room values that has already exist in the database.

Much thanks !

Answer 1

First of all see whether the similar entry already exist in table or not. If similar entry is not exist in table only then you may provide entry into databse.

Make similar query as below:

 SELECT * FROM yourTable WHERE date = yourDate AND starttime = yourStarttime AND room == yourRoom 

If returned result from above query is NULL then make entry into database , otherwise skip entry operation.

Answer 2

 if exists(select * from tablename where date = date and starttime = starttime and date=date)
 begin
---   insert (here It Check data is There If there in begin statement U can insert
 end
else
 begin
 --if any operation if No data there 
end

or

 if exists(select * from tablename where date = date and starttime = 
  starttime and date=date)
 begin
       declare @count int ;
       set count=  select count(*) from tablename where date = date and starttime=starttime and date=date
       if(@count ==0 )
           begin
                -- Count is Zero
                ---   insert (here It Check data is There If there in begin statement U can 
           end 
       else
           begin 
                -- Count more than Zero 
           end
  end
  else
  begin
        --if any operation if No data there 
  end