Question

我喜歡這count job_id

• js_id int
• job_id int
• apply_date smalldatetime

代碼：

string cmdstr3 = "SELECT COUNT(job_id) FROM applied_jobs 
        WHERE js_id='" + jsId + "' AND apply_date='" + DateTime.Now.Date + "'";` 

string cmdstr4 = "SELECT COUNT(job_id) FROM applied_jobs 
        WHERE js_id='" + jsId + "' AND (apply_date >='" + start_date.Date + "' AND apply_date <'" + end_date.Date+ "')"; 

但它算作0

我有這樣

3/6/2012 12:00:00 AM 
3/6/2012 12:00:00 AM 
3/5/2012 12:00:00 AM 

Answer 1

數據看來你想要得到的條目計數的某js_id當前日期。下面是你應該做的只是：

var cmd = new SqlCommand("SELECT COUNT([job_id]) FROM [applied_jobs] WHERE [js_id] = @jsid AND datediff(day,[apply_date], @applydate) = 0",cn); 
cmd.Parameters.Add("@jsid", SqlDbType.Int).Value = jsId; 
cmd.Parameters.Add("@applydate", SqlDbType.SmallDateTime).Value = DateTime.Now.Date;