sql - How break a time range between n numbers of equal intervals? -


timemin: 2015-04-29 10:57:56.623

timemax: 2015-04-29 11:04:35.133

i trying write select query break n equal intervals

this attempt:

declare @min int select @min  = min(datediff(ss,'1970-01-01', biddate)) tbl_bids declare @max int select @max  = max(datediff(ss,'1970-01-01', biddate)) tbl_bids  declare @numparts int  select @numparts =count(*) tbl_bids  select ((datediff(ss,'1970-01-01', biddate) * (@max - @min) / @numparts) + 1) - ((@max - @min) / @numparts),  (datediff(ss,'1970-01-01', biddate) * (@max - @min) / @numparts) + 1 tbl_bids  datediff(ss,'1970-01-01', biddate)<= @numparts

but returns 0 rows.

example:

min: 2015-04-29 10:50:00

max: 2015-04-29 11:00:00

if numparts = 5 (breaking 5 equal intervals)

output should be:

2015-04-29 10:52:00 2015-04-29 10:54:00 2015-04-29 10:56:00 2015-04-29 10:58:00 2015-04-29 11:00:00

you can total diff of seconds between dates , use equal parts. this.

declare @dt_min datetime = '2015-04-29 10:50:00'  declare @dt_max datetime = '2015-04-29 11:00:00'  declare @parts int = 5 declare @sec bigint = datediff(second,@dt_min,@dt_max)/@parts  select top (@parts) dateadd(second,@sec*(row_number()over(order (select 1)) - 1) ,@dt_min) sys.tables

and query, this.

declare @dt_min datetime select @dt_min  = min(biddate) tbl_bids declare @dt_max datetime select @dt_max  = max(biddate) tbl_bids  declare @numparts int  select @numparts =count(*) tbl_bids  declare @sec bigint = datediff(second,@dt_min,@dt_max)/@numparts  select dateadd(second,@sec*(row_number()over(order biddate) - 1) ,@dt_min) tbl_bids

Comments

Post a Comment

Popular posts from this blog

php - failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request -

this code i'm using find latitude , longitude of place: function coords($address){ echo $url="http://maps.googleapis.com/maps/api/geocode/json?address=".$address; $json = file_get_contents(urlencode($url)); $data = json_decode($json, true); print_r($data['results'][0]['geometry']['location']['lat']); print_r($data['results'][0]['geometry']['location']['lng']); } however returns warning: failed open stream: http request failed! http/1.0 400 bad request if use above code in simple procedure works fine not in function. note: have tried curl_init()... method produced same result? instead of encoding whole url encode address part. following code work fine $add='jamshoro phase 2'; $url="http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($add); $json = file_get_contents($url); $data = json_decode($json, true); print_r($data['r
Read more

java - How to filter a backspace keyboard input -

i have code gives message when key number pressed: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochararray().length - 1]; if (!(ch >= '0' && ch <= '9')) { system.out.println("the char entered not number"); t.consume(); } } }); now if press on wrong button , press backspace remove it, error message. how can add backspace input if statement? i have found answer: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochar
Read more

java - Show Soft Keyboard when EditText Appears -

i have code in android app, alert dialog , keyboard, , when dialog shown want keyboard appear. not , not sure why? here code: final alertdialog.builder alert = new alertdialog.builder(this); alert.settitle("title"); alert.setmessage("message"); final edittext input = new edittext(this); input.setinputtype(inputtype.type_class_number); alert.setview(input); input.setonfocuschangelistener(new view.onfocuschangelistener() { @override public void onfocuschange(view v, boolean hasfocus) { if (hasfocus) { log.i(tag, "in focus"); inputmethodmanager inputmethodmanager = (inputmethodmanager) getsystemservice(context.input_method_service); inputmethodmanager.showsoftinput(input, inputmethodmanager.show_implicit); } } }); but keyboard not appear though edit text in focus, , tell appear why, doesn't come up? thanks in advance.
Read more