RE: Group By Problem

[Peter He]

You need to group by event_text, not obj_text:
 
select source_id ,event_text,count(*) from event_loc 
group by source_id,event_text;
 
 
 Date: Tue, 8 Feb 2011 16:31:39 +0530
 From: adarsh.sha...@orkash.com
 To: mysql@lists.mysql.com
 Subject: Group By Problem
 
 Dear all,
 
 I stuck around one more simple problem today.
 
 I have a table named *event_loc* having below data : ( It has many 
 columns but I show you main columns that I needed )
 
 _*Tables Data :-*_
 
 *source_id event_text*
 
 1233 meet
 1233 meet
 1345 ends
 1345 ends
  performs
 13456 Minister
 1233 Argentina
 1233 meet
 1345 ends
 1555 is
 
 As described above there are more than 10 rows and I want my output as :
 
 _*Output Needed :-*_
 
 *source_id event_text Count*
 
 1233 meet 3
 1233 Argentina 1
 1345 ends 3
  performs 1
 13456 Minister 1
 
 
 I tried the below query :
 
 *select source_id ,event_text,count(*) from event_loc group by 
 source_id,obj_text ;*
 
 But displays only unique record_id rows but I want as mentioned output.
 
 Failed to achieve the mentioned output.
 
 
 Thanks  Regards
 
 Adarsh Sharma
  

RE: Question about database value checking

[Peter He]

Are you using the strict SQL mode?  Check your my.cnf file.
 
Peter
 
 Date: Fri, 4 Feb 2011 14:08:01 -0800
 From: awall...@ihouseweb.com
 To: mysql@lists.mysql.com
 Subject: Question about database value checking
 
 So, a problem popped up today that has caused us no end of hair-pulling, and
 it brought to mind a similar issue that I found very, well, wrong.
 
 If you have a table defined:
 
 CREATE TABLE `tester_table` (
 `acnt` varchar(20) NOT NULL DEFAULT '',
 `method` varchar(10) NOT NULL DEFAULT '',
 `card_num` varchar(100) NOT NULL DEFAULT '',
 PRIMARY KEY (`acnt`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 
 And try this:
 
 INSERT INTO tester_table (acnt, method, card_num)
 VALUES ('test1', 'push', NULL);
 
 That fails. and gives a nice error. But:
 
 INSERT INTO tester_table (acnt, method, card_num)
 VALUES ('test1', 'push', 'A12345');
 
 UPDATE tester_table set card_num = NULL WHERE acnt = 'test1';
 
 That succeeds, but it puts an empty string into the card_num column. I
 would have thought (hoped) that an error would be thrown in that case as
 well. On a similar note, the following table:
 
 CREATE TABLE `tester_table2` (
 `acnt` varchar(20) NOT NULL,
 `required` enum('NO','DETAILS','RESULTS') NOT NULL,
 PRIMARY KEY (`acnt`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8
 
 Lets you insert:
 
 INSERT INTO tester_table2 (acnt, required) VALUES ('A123456', 'THIS IS NOT 
 REAL');
 
 Though it just puts an empty string into the required column.
 
 Is there a setting for mysql to return errors in these cases? It seems silly 
 to set
 up an enum column, or a not null column, and not have the possible values 
 enforced?
 
 thanks,
 andy
 
 
 -- 
 Andy Wallace
 iHOUSEweb, Inc.
 awall...@ihouseweb.com
 (866) 645-7700 ext 219
 --
 There are two ways to build software:
 Make it so simple that there are obviously no bugs,
 or make it so complex that there are no obvious bugs.
 
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