How to search SQL Server database using C#

Question

I have a SQL Server table Registration with name and datetime, I want to search the data with datetime which is less then datetime.now .

SqlDataAdapter cs = 
    new SqlDataAdapter("Select * from Registration where Date > DateTime.now")

I want that datetime is less then today.

Answer 1

The T-SQL built-in function getdate() returns the current server date/time.

Therefore your query should be, SELECT * FROM Registration WHERE [Date] < getdate() .

Using this in your code would be:

SqlDataAdapter cs = new SqlDataAdapter("Select * from Registration where [Date] < getdate()")

Answer 2

您可以使用SQL GETDATE()执行此操作：

SqlDataAdapter cs = new SqlDataAdapter("Select * from Registration where Date < GETDATE()")

Answer 3

使用GETDATE（）获取查询中的当前日期。

SqlDataAdapter cs = new SqlDataAdapter("Select * from Registration where Date < GETDATE()");

Answer 4

This may work... if you want to use .NET DateTime, that will be the date of the local system.

     SqlDataAdapter cs = new SqlDataAdapter(
           "SELECT * FROM [Registration] 
            WHERE [Date] < '" + DateTime.Now.ToShortDateString() +"';");

     //output: SELECT * FROM [Registration] WHERE [Date] < '2/22/2013';

It is going to depend upon the data type of the [date] column, if it is string or datetime or something else. If it is YYYYmmdd, then you can manipluate the DateTime.Now output to match.

Answer 5

Its very simple..

if you want to use sql current datetime use SELECT * FROM Registration WHERE [Date] < getdate()

and if you want your application current datetime use

"SELECT * FROM Registration WHERE [Date] < '+Datetime.Now.Tostring() +'"

Also try to use parameterized query if you want second option.