extraction of data in a comma-deliniated in a Mysql database list

I have a database table called meetings. In the table of meetings, it has columns named 'meeid', 'meedate' and 'meememberIDs '. using ColdFusion 9, I am able to present a date Standard in the "meedate" and a comma-delimited list in memberID that was present from a series of checkboxes in a form. It looks like this:

meeid = 2

"meedate = '" 2014-06-15

meememberIDs = '3,5,67,78,354, 2345'

Now that I have a record of the date and a is list of comma-delineate of membersID who came to a meeting, possible using SQL support to extract the Member ID and numbers match the primary key of another table called 'personal' in which each column meememberIDs comma-delimited number would return the name and the email to the Member of the staff?

example:

3 = michael jones- [email protected]

5 = ebinger chris- [email protected]

67 = alfred Fox- [email protected]

College Kid,

Storage of lists separated by commas in a single database column is generally considered to be "a bad idea". Why? Mainly, for the simple reason you're struggling with - these data to other tables. A junction table or a relationship is the best way to store multiple values. Here's how this might work (there might be some subtle problems with the structure/query of the table syntax below that I have no experience with MySQL, only Microsoft SQL Server):

Table of assemblies:

meeid (integer)

meedate (date or time)

Table of personnel:

personnelID (or whatever it is called in your table) (integer)

FullName (varchar())

email (varchar())

... the rest columns in existing table

Table MeetingsPersonnel:

meeid (integer)

personnelID (integer)

Instead of storing a list separated by commas on identifying personal in the meetings table meememberIDs column, you would insert a record in the MeetingsPersonnel table for each combination of staff and the meeting. Thus in the example above, the three topics that you have demonstrated would be stored in the MeetingsPersonnel table like this:

meeid personnelID

2 3

2 5

2 67

Now if you want to generate a list of people who attend meetings, join meetings to staff through the MeetingsPersonnel table:

SELECT p.fullname,
       p.email
FROM meetings m
     INNER JOIN meetingspersonnel mp on m.meeid = mp.meeid
     INNER JOIN personnel p on mp.personnelID = p.personnelID
WHERE m.meedate = '2014-06-15'

If you create indexes on these tables, this arrangement will happen very, very quickly.

The alternative is to write your own function to parse the list separated by commas into a temporary table and then use the temporary table to be the intermediate join. It will be very inefficient, especially as the number of employees who attend a specific meeting increases.

-Carl V.

Tags: ColdFusion

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I want to extract xml data in a collection of collection

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ex:

declare
type t_code is table of number;
type r_rec is record (c_name varchar2 (100),)
c_code vrachar2 (100),
c_code_number t_code);
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< body >
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< code > < code > CAMP_1
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< rateplanCode > 2 < / rateplanCode >
< rateplanCode > 3 < / rateplanCode >
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< rateplans >
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< > 22 rateplanCode < / rateplanCode >
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Start

Select / * logic exrat value of xml in the final collection * /.
Double;

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CAMP_1, Campaign_1, nested_table (1,2,3)
CAMP_2, Campaign_2, nested_table (11,22,33)
CAMP_3, Campaign_3, nested_table (111,222,333)

Published by: 948596 on May 17, 2013 05:17

Like this

SQL> declare
  2       type t_code is table of number ;
  3       type r_rec is record
  4       (
  5          c_name varchar2(100),
  6          c_code varchar2(100),
  7          c_code_number t_code
  8       );
  9       type t_rec is table of r_rec ;
 10       l_rec t_rec := t_rec();
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 12                        ('
 13                           
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 16                           Campaign_1
 17                           
 18                           1
 19                           2
 20                           3
 21                           
 22                           
 23                           
 24                           CAMP_2
 25                           Campaign_2
 26                           
 27                           11
 28                           22
 29                           33
 30                           
 31                           
 32                           
 33                           CAMP_3
 34                           Campaign_3
 35                           
 36                           111
 37                           222
 38                           333
 39                           
 40                           
 41                           
 42                           00
 43                           Success
 44                           
 45                           '
 46                        ) ;
 47  begin
 48       for i in (
 49                 select rownum id
 50                      , t1.code
 51                      , t1.description
 52                      , t2.rate_plan_code
 53                      , row_number() over(partition by t1.code order by t2.rate_plan_code) rno
 54                   from xmltable
 55                        (
 56                             '/body/campaign' passing l_xml
 57                             columns
 58                               code        varchar2(100) path 'code',
 59                               description varchar2(100) path 'description',
 60                               rate_plans  xmltype       path 'rateplans'
 61                        ) t1
 62                      , xmltable
 63                        (
 64                             '/rateplans/rateplanCode' passing t1.rate_plans
 65                             columns
 66                               rate_plan_code varchar2(100) path '.'
 67                        ) t2
 68                )
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 73               l_rec(l_rec.count).c_code := i.code;
 74               l_rec(l_rec.count).c_code_number := t_code();
 75            end if;
 76            l_rec(l_rec.count).c_code_number.extend;
 77            l_rec(l_rec.count).c_code_number(i.rno) := i.rate_plan_code;
 78       end loop;
 79       for i in 1..l_rec.count
 80       loop
 81          dbms_output.put_line(l_rec(i).c_code || '  ' || l_rec(i).c_name);
 82          for j in 1..l_rec(i).c_code_number.count
 83          loop
 84             dbms_output.put_line(l_rec(i).c_code_number(j));
 85          end loop;
 86       end loop;
 87  end;
 88  /
CAMP_1  Campaign_1
1
2
3
CAMP_2  Campaign_2
11
22
33
CAMP_3  Campaign_3
111
222
333

PL/SQL procedure successfully completed.

SQL>

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