November 15, 2013 at 10:24 am
currently i have a table that has the following layout, exact details of table not needed.
table1
pkey,
mf_1 char(5),
mf_2 char(5),
mf_3 char(5),
mf_4 char(5),
mf_5 char(5),
mf_6 char(5),
...
mf_50 char(5);
the field mf is repeated from _1 thru _50, i know it is an efficient way to input/mnt that data but that is the way they did it.
now my problem is that the information stored in mf_# can and does vary by row.
rows
1,'ABC','XYZ','MNO',....
2,'XYZ','JKL','UVW','ABC',....
3,'RST',DEF','GHI',....
Currently i am testing everyone of the mf_# to find any rows that contain 'ABC',
IS there a better way to do that or am i stuck with checking everyone of the mf_# columns?
November 15, 2013 at 10:29 am
Other than Full-Text Indexes (maybe, not sure), there is no way to do this: you are stuck.
And this is only one of the reasons not to make non-relational unnormalized tables like this.
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November 15, 2013 at 10:41 am
i agree with that my suggestion was to change the table into 2 tables master/detail but had no say in the final outcome. so i am stuck with using the long query...
November 15, 2013 at 1:02 pm
Would UNPIVOT possibly be helpful in this type of scenario?
November 15, 2013 at 1:07 pm
Not sure how to use UNPIVOT but i will do some checking to see if it will do the job.
Thanks...
November 15, 2013 at 1:13 pm
Yeah, honestly I'm not clear on the specifics of it either. But conceptually I understand what it does, and this seems to fit the bill AFAIK... I hope you'll report back!
November 15, 2013 at 2:27 pm
OK I can use the UNPIVOT to get me the information of the mf_# that contains a matching value.
select pkey, mf_value, mf_field from table1
unpivot
(mf_value for mf_field in (mf_1, mf_2, mf_3,..., mf_50)) as pvtTable where mf_value = 'ABC'
Now my returned rows are...
1, 'ABC',mf_1
2,'ABC',mf_4
and this is good, how would i go about using mf_field value mf_1 and mf_4 to reference a corresponding field in another table.
i would like get the values for cf_1 and cf_4 to go along with the results above...
Table2
pkey,
cf_1 int,
cf_2 int,
cf_3 int,
cf_4 int,
...
cf_50;
November 15, 2013 at 9:02 pm
roy.tollison (11/15/2013)
OK I can use the UNPIVOT to get me the information of the mf_# that contains a matching value.select pkey, mf_value, mf_field from table1
unpivot
(mf_value for mf_field in (mf_1, mf_2, mf_3,..., mf_50)) as pvtTable where mf_value = 'ABC'
Now my returned rows are...
1, 'ABC',mf_1
2,'ABC',mf_4
and this is good, how would i go about using mf_field value mf_1 and mf_4 to reference a corresponding field in another table.
i would like get the values for cf_1 and cf_4 to go along with the results above...
Table2
pkey,
cf_1 int,
cf_2 int,
cf_3 int,
cf_4 int,
...
cf_50;
If it's always cf_1 and cf_4, a normal inner join is all that's required.
--Jeff Moden
November 15, 2013 at 11:36 pm
actually i am looking more for something like this
select pkey, mf_value, mf_field, REPLACE(mf_field,'mf_','cf_') as cf_field from table1, table2
unpivot
(mf_value for mf_field in (mf_1, mf_2, mf_3,..., mf_50)) as pvtTable where mf_value = 'ABC'
Yeah i know that isn't the way to do it but that is what i am looking for...
November 16, 2013 at 1:06 am
i guess i could put the results into a table then use a cursor and process all the rows and use the value in the cf_field(real column name is stored in there) and then build an update command to load up the int value that is assigned to that column for that row.
will be a while before i get all the basics in place and all the bugs worked out...
November 17, 2013 at 5:52 pm
roy.tollison (11/16/2013)
i guess i could put the results into a table then use a cursor and process all the rows and use the value in the cf_field(real column name is stored in there) and then build an update command to load up the int value that is assigned to that column for that row.will be a while before i get all the basics in place and all the bugs worked out...
Heh... yeah. Let us know how the cursor thing works you for you. 😉
Since folks still have questions about what you're actually trying to do, I recommend that you try to clarify the problem using the suggestions from the 1st link under "Helpful Links" in my signature line below. Obviously, you don't have to post the whole table or a million rows of data but there's nothing like cold hard data in a table to clarify a problem.
--Jeff Moden
November 17, 2013 at 6:02 pm
CREATE TABLE [dbo].[nTable](
[p_key] [int] NOT NULL,
[mf_1] [char](5) NULL,
[mf_2] [char](5) NULL,
[mf_3] [char](5) NULL,
[mf_4] [char](5) NULL,
[mf_5] [char](5) NULL,
[cf_1] [int] NULL,
[cf_2] [int] NULL,
[cf_3] [int] NULL,
[cf_4] [int] NULL,
[cf_5] [int] NULL,
CONSTRAINT [PK_nTable] PRIMARY KEY CLUSTERED
(
[p_key] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
Sample Data...
p_key mf_1 mf_2 mf_3 mf_4 mf_5 cf_1 cf_2 cf_3 cf_4 cf_5
1 AAA BBB CCC DDD EEE 5 5 5 5 5
2 BBB DDD BBB BBB BBB 5 5 5 5 5
3 EEE DDD CCC BBB AAA 5 5 5 5 5
4 FFF HHH III AAA NULL 4 4 4 4 NULL
5 ZZZ NULL NULL NULL NULL 1 NULL NULL NULL NULL
6 GGG BBB EEE AAA NULL 4 4 4 4 NULL
7 MMM EEE AAA NULL NULL 3 3 3 NULL NULL
8 NULL NULL NULL NULL NULL 0 0 0 0 0
9 RRR TTT DDD BBB CCC 5 5 5 5 5
10 BBB CCC AAA NULL NULL 3 3 3 NULL NULL
11 CCC AAA NULL BBB NULL 3 3 NULL 3 NULL
12 WWW UUU AAA CCC EEE 5 5 5 5 5
13 SSS AAA DDD EEE NULL 4 4 4 4 NULL
14 EEE FFF BBB AAA NULL 4 4 4 4 NULL
15 TTT NULL NULL NULL NULL 1 NULL NULL NULL NULL
16 YYY AAA NULL NULL NULL 2 2 NULL NULL NULL
17 GGG XXX BBB NULL NULL 3 3 3 NULL NULL
18 BBB AAA CCC EEE DDD 5 5 5 5 5
19 PPP BBB TTT JJJ NULL 4 4 4 4 NULL
20 KKK LLL NULL NULL NULL 2 2 NULL NULL NULL
drop table pvtTable
select p_key, mf_value, mf_field, REPLACE(mf_field,'mf_','cf_') as cf_field into pvtTable from nTable
unpivot
(mf_value for mf_field in
(mf_1, mf_2, mf_3, mf_4, mf_5)) as pvtTable where mf_value in ('AAA','BBB')
declare getCSField cursor for select p_key, cf_field from pvtTable
open getCSField
declare @cmd varchar(max),
@P_Key int,
@CSField as varchar(100);
fetch next from getCSField into @P_Key, @CSField
while @@FETCH_STATUS = 0
begin
begin try
execute ('select ' + @P_Key + ' as p_key, ' + @CSField + ' from nTable where p_key = ' + @P_Key)
end try
begin catch
select @P_Key, @CSField
end catch
fetch next from getCSField into @P_Key, @CSField;
end
CLOSE getCSField
DEALLOCATE getCSField
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