I'm looking to select the primary key of a row and I've only got a column that contains info (in a substring) that I need to select the row.
E.g. MyTable
ID | Label
------------
11 | 1593:#:#:RE: test
12 | 1239#:#:#some more random text
13 | 12415#:#:#some more random text about the weather
14 | 369#:#:#some more random text about the StackOverflow
The label column has always a delimiter of :#:#:
So really I guess, I'd need to be able to split this row by the delimiter, grab the first part of the label column (i.e. the number I'm looking) to get the id I wanted.
So, If I wanted row with ID of 14, then I'd be:
Select ID from MyTable
where *something* = '369'
Any ideas on how to construct something ..or how best to go about this:)
I'm completely stumped and haven't been able to find how to do this.
Thanks,
How about:
WHERE label LIKE '369#%'?
No reason to get fancy.
Although.. if you are going to do this search often, then maybe pre-split that value out to another column as part of your ETL process and index it.
Below are the input and output details.Any database Oracle, SQL Server and MySQL should do for the answers.I am not able to derive the logic to rank data which will help me to pivot.
My source is a flat file which contains data like below.I have loaded that file into one of the tables in Oracle.
Source Input:
**Flatfile1**
**Coulmn1**
Kamesh
65
5000
123456789
Nanu
45
3000
321654789
Expected Output:
Name Age Salary Mobilenumber
Kamesh 65 5000 123456789
Nanu 45 3000 321654789
After loading into one of the tables I am applying the logic to number this data which will eventually look like below:
Column1 Datavalue
Kamesh 1
65 1
5000 1
123456789 1
Nanu 2
45 2
3000 2
321654789 2
However, I am not able to derive logic (I tried with Rank) which will give me sequence number like this without having any key field.Hope this explains situation.
Thanks!!
Oracle doesn't store the rows in order, if you do select * from table1 multiple times you could get rows in different orders according to db operations and caching
Therefore if you have a table like that with no other column it's impossible to "pivot" the data.
I strongly suggest to save data in a normalized form, if you can't consider adding a column with a row ID populated automatically (identity column in oracle 12, trigger+ sequence in previous version)
Once you have your rows in order it will be easy to organize your data
I have 2 columns in a sql database that are integers (in separate tables), i'll simplify my problem to explain. I have to replicate what has been done in excel in SQL and don't know how to do it. In basic terms I have to loop through all of one table multiplying all by the first record in the 2nd table, then the 2nd row and so on. Building up a table. I don't know how to do this does anyone have any ideas? Example below.
Column A:| Column B:
12 | 36
24 | 89
26
The result output should a table like:
A | B
432 | 1068
864 | 2136
936 | 2314
So 36 has been multiplied by 12, 24 then 26 to create the first column and then 89 multiplied by 12, 24 then 26 to create the 2nd column and so on
The reality columns have 400+ rows to multiply by so the result is a huge table, how can i do this looping through and adding columns to build a calculated table. Hope that makes sense, any help would be greatly appreciated.
Since I dont know how your database looks like here is a generic code that could work for you.
select tableA.colA, tableB.colb, (tableA.colA*tableB.colB) as colC
from tableA
join tableB (on ... if there is something to join on).
This will give you three columns though, the two original columns and the third multiplied column. You could ofcourse remove colA and colB oif you dont need them, they are just there for reference.
this code should work in most sql-languages.
Many thanks for your help, I sorted out the problem with a cross join
I have a column that stores 2 values. Example below:
| Column 1 |
|some title1 =ExtractThis ; Source Title12 = ExtractThis2|
I want to remove 'ExtractThis' into one column and 'ExtractThis2' into another column. I've tried using a substring but it doesn't work as the data in column 1 is variable and therefore it doesn't always carve out my intended values. SQL below:
SELECT substring(d.Column1,13,24) FROM dbo.Table d
This returns 'Extract This' but for other columns it either takes too much or too little. Is there a function or combination of functions that will allow me to split consistently on the character? This is consistent in my column unlike my length count.
select substring(col1,CHARINDEX('=',col1)+1,CHARINDEX (';',col1)-CHARINDEX ('=',col1)-1) Val1,
substring(col1,CHARINDEX('=',col1,CHARINDEX (';',col1))+1,LEN(col1)) Val2
from #data
there is duplicate calculation that can be reduced from 5 to 3 to each line.
but I want to believe this simple optimization done by SQL SERVER.
I have one table that stores a range of integers in a field, sort of like a print range, (e.g. "1-2,4-7,9-11"). This field could also contain a single number.
My goal is to join this table to a second one that has discrete values instead of ranges.
So if table one contains
1-2,5
9-15
7
And table two contains
1
2
3
4
5
6
7
8
9
10
The result of the join would be
1-2,5 1
1-2,5 2
1-2,5 5
7 7
9-15 9
9-15 10
Working in SQL Server 2008 R2.
Use a string split function of your choice to split on comma. Figure out the min/max values and join using between.
SQL Fiddle
MS SQL Server 2012 Schema Setup:
create table T1(Col1 varchar(10))
create table T2(Col2 int)
insert into T1 values
('1-2,5'),
('9-15'),
('7')
insert into T2 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10)
Query 1:
select T1.Col1,
T2.Col2
from T2
inner join (
select T1.Col1,
cast(left(S.Item, charindex('-', S.Item+'-')-1) as int) MinValue,
cast(stuff(S.Item, 1, charindex('-', S.Item), '') as int) MaxValue
from T1
cross apply dbo.Split(T1.Col1, ',') as S
) as T1
on T2.Col2 between T1.MinValue and T1.MaxValue
Results:
| COL1 | COL2 |
----------------
| 1-2,5 | 1 |
| 1-2,5 | 2 |
| 1-2,5 | 5 |
| 9-15 | 9 |
| 9-15 | 10 |
| 7 | 7 |
Like everybody has said, this is a pain to do natively in SQL Server. If you must then I think this is the proper approach.
First determine your rules for parsing the string, then break down the process into well-defined and understood problems.
Based on your example, I think this is the process:
Separate comma separated values in the string into rows
If the data does not contain a dash, then it's finished (it's a standalone value)
If it does contain a dash, parse the left and right sides of the dash
Given the left and right sides (the range) determine all the values between them into rows
I would create a temp table to populate the parsing results into which needs two columns:
SourceRowID INT, ContainedValue INT
and another to use for intermediate processing:
SourceRowID INT, ContainedValues VARCHAR
Parse your comma-separated values into their own rows using a CTE like this Step 1 is now a well-defined and understood problem to solve:
Turning a Comma Separated string into individual rows
So your result from the source
'1-2,5'
will be:
'1-2'
'5'
From there, SELECT from that processing table where the field does not contain a dash. Step 2 is now a well-defined and understood problem to solve These are standalone numbers and can go straight into the results temp table. The results table should also get the ID reference to the original row.
Next would be to parse the values to the left and right of the dash using CHARINDEX to locate it, then the appropriate LEFT and RIGHT functions as needed. This will give you the starting and ending value.
Here is a relevant question for accomplishing this step 3 is now a well-defined and understood problem to solve:
T-SQL substring - separating first and last name
Now you have separated the starting and ending values. Use another function which can explode this range. Step 4 is now a well-defined and understood problem to solve:
SQL: create sequential list of numbers from various starting points
SELECT all N between #min and #max
What is the best way to create and populate a numbers table?
and, also, insert it into the temp table.
Now what you should have is a temp table with every value in the exploded range.
Simply JOIN that to the other table on the values now, then to your source table on the ID reference and you're there.
My suggestion is to add one more field and many more records to your ranges table. Specifically, the primary key would be the integer and the other field would be the range. Records would look like this:
number range
1 1-2,5
2 1-2,5
3 na
4 na
5 1-2,5
etc
Having said that, this is still rather limiting because a number can only have one range. If you want to be thorough, set up a many to many relationship between numbers and ranges.
As far as I can tell you best option is something like below:
Create a table value function that accepts your ranges an converts them to a collection of ints. So 1-3,5 would return:
1
2
3
5
Then use these results to join to other tables. I don't have an exact function to do this at hand, but this one seems like an excellent start.