Select within a select within a select within a select within a select -


i'm trying make heads & tails of reasoning behind multiple select statements within each other. in other words, point? note: i'm pretty familiar t-sql...i've been moved maintenance aspect of sql server developing side of it. below code (in part) confuses me:

select distinct id ,name ,typecode ,productid ,productname ,locationcode ,county ,state ,recommendationtype ,packagename ( select c.id     ,c.name     ,p.typecode     ,p.productid     ,p.productname     ,p.locationcode     ,p.county     ,p.state     ,'appened' recommendationtype     ,packagename (     select op.*         ,t.i.value('@productid', 'varchar(50)') productid         ,t.i.value('@name', 'varchar(50)') product     (         select pg.customerid             ,pg.name packagename             ,pg.runtimedefinition.query('/packagedefinition/products')                                    clist         product.package pg (nolock)         ) op     cross apply clist.nodes('products/task[@xsi:type="producttask"]') t(i)     ) m

remember...this code in part.

thanks!!

well second 1 in seems tad pointless adds 1 column populated literal, other that.

in previous incarnation may have done more , re-factoring deemed effort, or maybe suffered developer amnesia. "i thought i'd done that" manager interruption, go off fix bit of code , forget haven't finished one.

as technique it's nice way of coming solution. call inside out, there's scientific name though.

after effort put in cross apply xml , getting working, it's easier use result , bolt on behaviour wrapping inner query.

it's less noisy temporary table , possibly developed pre ctes or dev not comfortable them .

try , write in oner, might start seeing point or two. :)


Comments

Post a Comment

Popular posts from this blog

c++ - CryptStringToBinary API behavior -

i seeing strange behavior cryptstringtobinary cryptography api. please see below code (config: x64 debug): #include "stdafx.h" #include <windows.h> #include <strsafe.h> #include <iostream> #include <exception> void main() { dword dwskip; dword dwflags; dword dwdatalen; //lpcwstr pszinput = l"jaaaaaecaaadzgaaakqaagdnnl1l56bwgfjdgr3rpxtqqqn6daw3usv2emkjym4t"; //this works fine lpcwstr pszinput = l"mytest"; //doesnt work, api returns false,error code 0x0000000d // determine size of byte array , allocate memory. if(! cryptstringtobinary( pszinput, _tcslen( pszinput ) + 1, crypt_string_base64, null, &dwdatalen, &dwskip, &dwflags ) ) { dword dw = getlasterror(); //0x0000000d: data invalid throw std::exception( "error computing byte length." ); } byte *pbytebyte = null; try { ...
Read more

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more

iphone - Three second countdown in cocos2d -

i trying have 3 second countdown display when level beat in game. did: -(void) gamesegmentbeat { [self pauseschedulerandactions]; // overlay game opaque background ccsprite *opaquebg = [ccsprite spritewithfile:@"background1.png"]; opaquebg.position = screencenter; [self addchild:opaquebg z:10000]; // these 3 labels 3 seconds cclabelttf *three = [cclabelttf labelwithstring:@"3" fontname:@"helvetica" fontsize:100]; three.position = ccp(screencenter.x, screencenter.y); cclabelttf *two = [cclabelttf labelwithstring:@"2" fontname:@"helvetica" fontsize:100]; two.position = ccp(screencenter.x, screencenter.y); cclabelttf *one = [cclabelttf labelwithstring:@"1" fontname:@"helvetica" fontsize:100]; one.position = ccp(screencenter.x, screencenter.y); // secondspast specified in update method secondspast = 0; if (secondspast == 1) { [self addchild:thr...
Read more