I have an Access table where I have transaction IDs in the below format:
Transaction_ID
39296165-1
39296165-2
39296165-3
39284029-1
39284029-2
I am trying to write a query which finds the dash and removes the -1,-2,-3 etc., so I can then de-duplicate based on the string before the dash.
I've written the below:
UPDATE mytable
SET Transaction_ID=Left(Transaction_ID,InStr(1,Transaction_ID,"-")-1)*
Which works fine, however, when it comes across a Transaction_ID which doesn't have a dash in the string, it gives me a type conversion and replaces the string with a blank value.
Any advice on error-trapping this?
Add a WHERE clause to only update if InStr does not return -1:
WHERE InStr(1,Transaction_ID,"-") > 0
This would also work and would be more efficient.
WHERE Transaction_ID LIKE "*-*"
Related
I want to add a column called "Sweep" that contains bools based on whether the "Result" was a sweep or not. So I want the value in the "Sweep" column to be True if the "Result" is '4-0' or '0-4' and False if it isn't.
This is a part of the table:
I tried this:
ALTER TABLE "NBA_finals_1950-2018"
ADD "Sweep" BOOL;
UPDATE "NBA_finals_1950-2018"
SET "Sweep" = ("Result" = '4-0' OR "Result" = '0-4');
But for some reason, when I run this code...:
SELECT *
FROM "NBA_finals_1950-2018"
ORDER BY "Year";
...only one of the rows (last row) has the value True even though there are other rows where the result is a sweep ('4-0' or '0-4') as shown in the picture below.
I don't know why this is happening but I guess there is something wrong with the UPDATE...SET code. Please help.
Thanks in advance.
NOTE: I am using PostgreSQL 13
This would occur if the strings are not really what they look like -- this is often due to spaces at the beginning or end. Or perhaps to hyphens being different, or other look-alike characters.
You just need to find the right pattern. So so with a select. This returns no values:
select *
from "NBA_finals_1950-2018"
where "Result" in ('4-0', '0-4');
You can try:
where "Result" like '%0-4%' or
"Result" like '%4-0%'
But, this should do what you want:
where "Result" like '%4%' and
"Result" like '%0%'
because the numbers are all single digits.
You can incorporate this into the update statement.
Note: double quotes are a bad idea. I would recommend creating tables and columns without escaping the names.
My data lives in Big Query. There is one column that needs REGEX extraction. The example of the string is below:
?src=abb_fh_uit*_source=h&_medium=cpm&my_campaign=abb_hc_hr
src=abb_fh_uit*_source=h&_medium=cpm&my_campaign=goal_healthcare
?src=abb_fh_uit*_source=h&_medium=cpm&my_campaign=goal_hr
?src=abb_fh_uit*_source=h&_medium=cpm&my_campaign=abb_hr_healthcare
My desired output is this:
my_campaign=goal
my_campaign=goal
Basically I need to trim everything but my_campaign=goal
The code I wrote is in SQL, below:
LOWER(REGEXP_EXTRACT(my_column,r'my_campaign=([^&])')) AS my_campaign
it returns everything with my_campaign my_campaign=abb_hc_hr, my_campaign=goal_healthcare etc. How should I change the existing code to just grab my_campaign=goal?
Thank you.
Below is for BigQuery Standard SQL
You should use below
SELECT
LOWER(REGEXP_EXTRACT(my_column,r'(my_campaign=[^&]*)&?')) AS my_campaign
FROM your_table
WHERE LOWER(my_column) LIKE '%my_campaign=goal_%'
if applied to sample data from your question - output is
Row my_campaign
1 my_campaign=goal_healthcare
2 my_campaign=goal_hr
I am trying to use a simple Translate function to replace "-" in a 23 digit string. The example of one such string is "1049477-1623095-2412303" The expected outcome of my query should be 104947716230952412303
The list of all "1049477-1623095-2412303" is present in a single column "table1". The name of the column is "data"
My query is
Select TRANSLATE(t.data, '-', '')
from table1 as t
However, it is returning 104947716230952000000 as the output.
At first, I thought it is an overflow error since the resulting integer is 20 digit so I also tried to use following
SELECT CAST(TRANSLATE(t.data,'-','') AS VARCHAR)
from table1 as t
but this is not working as well.
Please suggest a way so that I could have my desirable output
This is too long for a comment.
This code:
select translate('1049477-1623095-2412303', '-', '')
is going to return:
'104947716230952412303'
The return value is a string, not a number.
There is no way that it can return '104947716230952000000'. I could only imagine that happening if somehow the value is being converted to a numeric or bigint type.
Try regexp_replace()
Taking your own example, execute:
select regexp_replace('[string / column_name]','-');
It can be achieve RPAD try below code.
SELECT RPAD(TRANSLATE(CAST(t.data as VARCHAR),'-','') ,20,'00000000000000000000')
I have a product table called PDPRODP - for certain styles within this table I used a concat statement to add a full-stop to their description (PRDESC), I now wish to remove this full stop.
The descriptions are varying length, the field max size is 30 characters and I need to physically remove the full-stop rather than using a select statement to trim the full-stop.
I tried;
UPDATE PDPRODP SET PRDESC = PRDESC-1 where PRSTYLE = 1234
But I got this error:
Character in CAST argument not valid.
I also tried this following some googling;
UPDATE PDPRODP SET PRDESC=LEFT(PRDESC, LEN(PRDESC)-1)
WHERE PRCOMP = 1 AND PRSTYL = 31285
But got this error:
LEN in *LIBL type *N not found.
Use LENGTH
UPDATE PDPRODP SET PRDESC=LEFT(PRDESC, LENGTH(PRDESC)-1)
WHERE PRCOMP = 1 AND PRSTYL = 31285
The REPLACE() function can search for all occurrences of some string, and substitute another in its place. You might search for your full-stop, and replace it with a zero-length string ''. This would be handy in cases where your search string may not always be at the end.
I found a weird problem with MySQL select statement having "IN" in where clause:
I am trying this query:
SELECT ads.*
FROM advertisement_urls ads
WHERE ad_pool_id = 5
AND status = 1
AND ads.id = 23
AND 3 NOT IN (hide_from_publishers)
ORDER BY rank desc
In above SQL hide_from_publishers is a column of advertisement_urls table, with values as comma separated integers, e.g. 4,2 or 2,7,3 etc.
As a result, if hide_from_publishers contains same above two values, it should return only record for "4,2" but it returns both records
Now, if I change the value of hide_for_columns for second set to 3,2,7 and run the query again, it will return single record which is correct output.
Instead of hide_from_publishers if I use direct values there, i.e. (2,7,3) it does recognize and returns single record.
Any thoughts about this strange problem or am I doing something wrong?
There is a difference between the tuple (1, 2, 3) and the string "1, 2, 3". The former is three values, the latter is a single string value that just happens to look like three values to human eyes. As far as the DBMS is concerned, it's still a single value.
If you want more than one value associated with a record, you shouldn't be storing it as a comma-separated value within a single field, you should store it in another table and join it. That way the data remains structured and you can use it as part of a query.
You need to treat the comma-delimited hide_from_publishers column as a string. You can use the LOCATE function to determine if your value exists in the string.
Note that I've added leading and trailing commas to both strings so that a search for "3" doesn't accidentally match "13".
select ads.*
from advertisement_urls ads
where ad_pool_id = 5
and status = 1
and ads.id = 23
and locate(',3,', ','+hide_from_publishers+',') = 0
order by rank desc
You need to split the string of values into separate values. See this SO question...
Can Mysql Split a column?
As well as the supplied example...
http://blog.fedecarg.com/2009/02/22/mysql-split-string-function/
Here is another SO question:
MySQL query finding values in a comma separated string
And the suggested solution:
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_find-in-set