mysql - How to get result set like Oracle lag function -


मेरे पास mysql टेबल है जो संरचना के नीचे है 

  | कोला | ColB | ColC | + ------------------ + ------ + | ए | Xxx | 40 | | ए | वाई वाई वाई | 40 | | ए | ज़ज़ | 40 | | बी | एबीसी | 50 | | बी | बीसीए | 50 | | सी | टीटीटी | 60 | | सी | एफएफएफ | 60 |   
 मुझे नीचे की तरह आउटपुट की आवश्यकता है  
  | कोला | ColB | ColC | + ------------------ + ------ + | ए | Xxx | 40 | | | वाई वाई वाई | | | | ज़ज़ | | | बी | एबीसी | 50 | | | बीसीए | | | सी | टीटीटी | 60 | | | एफएफएफ | |   
 Googling से मुझे  Group_Concat  फ़ंक्शन मिलता है।  
 लेकिन यह उसी कॉलम में xxx, yyy, zzz जैसे दे देंगे।  
  मैं उपरोक्त प्रारूप कैसे प्राप्त करूं?   
 कृपया मेरी सहायता करें।   
 
 
 ठीक है, निम्नलिखित पर विचार करें ...  
  ड्रॉप तालिका यदि मौजूदा एबीसी; टेबल एबीसी बनाएं (आईडी INT नहीं NULL AUTO_INCREMENT प्राथमिक कुंजी, कोला चार्द (1) नहीं, कॉलब सीआर (3) नल, ColC INT नहीं है); एबीसी (कोला, कोल्ब, कोल सी) मूल्यों में INSERT ('ए', 'xxx', 40), ('ए', 'वाई वाई वाई', 40), ('ए', 'जेज़', 40), ('बी ('सी', 'टीटीटी', 60), ('सी', 'एफएफएफ', 60); एबीसी से चयन करें; + ---- + ------ + ------ + ------ + | आईडी | कोला | ColB | ColC | + ---- + ------ + ------ + ------ + | 1 | ए | Xxx | 40 | | 2 | ए | वाई वाई वाई | 40 | | 3 | ए | ज़ज़ | 40 | | 4 | बी | एबीसी | 50 | | 5 | बी | बीसीए | 50 | | 6 | सी | टीटीटी | 60 | | 7 | सी | एफएफएफ | 60 | + ---- + ------ + ------ + ------ + SELECT id, a, b, c fROM (SELECT id, CASE जब कोला = @prev_a THR @curr_a: = '' शेष @curr_a: = कोला एक, @prev_a END: = कोला, मामला है जब ColB = @prev_b तो @curr_b: = '' शेष @curr_b: = ColB अंत ख, @prev_b: = ColB, मामला है जब ColC = @prev_c तो @curr_c: = '' शेष @curr_c: = ColC अंत ग, @prev_c: = ColC एबीसी से, (@curr_a का चयन करें = '', @prev_a = '', @curr_b = '', @prev_b = ' ', @curr_c =' ', @prev_c =' ') आईडी के द्वारा वार्स आदेश) आईडी के द्वारा आदेश; + ---- + ------ + ------ + ------ + | आईडी | एक | बी | सी | + ---- + ------ + ------ + ------ + | 1 | ए | Xxx | 40 | | 2 | | वाई वाई वाई | | | 3 | | ज़ज़ | | | 4 | बी | एबीसी | 50 | | 5 | | बीसीए | | | 6 | सी | टीटीटी | 60 | | 7 | | एफएफएफ | | + ---- + ------ + ------ + ------ +   
 मुझे इस बात का उल्लेख करना चाहिए कि यह कॉलेशन मैच मानता है (जैसे SET NAMES Utf8;)

Comments

Post a Comment

Popular posts from this blog

sql - Return Function using Cursor -

My current schedule is: USERID Department NAME Real Estimated 522 Xyz Department John Wayne 2/1/14/14 8:34 522 Investigation Department John Wayne 2/17/1411: 21 78 9Except Department Bill Smith 2/17/14 9:41 78 9 Excise Department Bill Smith 2/17/14 11:16 78 9 Excise Department Bill Smith 2 / 17/14 11:50 78 9 Excise Department Bill Smith 2/17/14 12: 18 856 Explore Department Raul Castill 2/17/14 9:25 I have to create a function which enables me to enter a user ID and that Allows the user to return data from the person. However, I want to take the first line and want to hold the actual date and then put it in the 'column' check and I also carry the last row and store it in 'Check Out' in the column call. Basically, for every day, I want to record the records in the user's time and want to take the time for each day. This is what I have done so far " return @RtnValue table (useridd integer, deptname varchar (max), emplname varchar (100), actualDate da...
Read more

c++ - why does this code produce a runtime error? -

contains # lt; Stdio.h & gt; #to & lt include, conio.h & gt; #to & lt include, windows.h & gt; Structure node {int a; Structure node * next; }; Zero constructivist (Structure node ** head) {struct node * p, * temp; Int n; Printf ("Enter number \ n"); Scanf ("% d", & amp; n); P = (straight node *) maulok (psychophag (strip node)); P-> = N; If (* head == 0) {* head = p; P-> Next = 0; Temporary = p; } And {temp-> next = p; Temporary = p; P-> Next = 0; }} Void frontbacksplit (Structure node ** head, Structure node ** Head1, Structure node ** Head 2) {int counter = 0, i; Structure node * temporary, * p; Temporary = * head; While (temporary! = 0) {counter ++; Temporary = temp-> Next; } Int n; If (counter% 2 == 0) {n = counter / 2; } And {n = (counter + 1) / 2; } Temp = * head; (I = 0; i & lt; n-1; i ++) for {if (* head1 == 0) {* head1 = temp; } Temp = temp- & gt; next; } P = temp; Temporary = temp-> Next; P-> Next ...
Read more

javascript - Is there any way to add a new parameter to a function programmatically? -

Since I can set the number of expectations by calling a function its function.length Property, do I have to programmatically create the right number of parameters to include in that function at runtime? Example: var xyz = function (a, b) {}; Var BCD = function (A, B, C, D, E, F) {}; // vararg example var doc = document, func_length = xyz.length; Doc.xyz = (function () {returns function (A, B, C, D, E) works for one / but other is not}}}. Call (doctor); / * With `only two parameters ', like' Return function (A, B)`, if this function is used for `xyz` (although in this case 5 works fine), and return function ( If the function is used for 'BCD' (which does not work with only five parameters) with A, B, C, D, E, F) `6 / / Xyz.apply (blank, arguments) Think about ... but which logic ..? : // Returning function (A, B, C, D, E) does not support work with more than five parameters, which will be mostly class - hence my question / I also know very well That I use an obj...
Read more