Related
I have taken reference from the internet about one user-defined function to locate 'nth occurrence of a string to do the sort column name in the database. I am using MySQL 5.5 version, not the latest version. Here is my sample database link https://dbfiddle.uk/?rdbms=mysql_5.5&fiddle=bcb32a6b47d0d5b061fd401d0888bdc3
My problem is I want to sort column name in the database follow the prefix number, but I am using below the SQL query, it doesn't work.
select t.id,t.name
from
(
select t.*, cast((case when col1_col2_ref > 0
then
substring_index(modified_name,'-',1)
else
modified_name
end
) as unsigned) col1
, cast((case when col1_col2_ref > 0
and col3_ref > 0
then
substr(modified_name,(col1_col2_ref + 1),(col3_ref - (col1_col2_ref + 1)))
when col1_col2_ref > 0
then
substr(modified_name,(col1_col2_ref + 1))
end) as unsigned) col2
, cast((case when col3_ref > 0
and col4_ref > 0
then
substr(modified_name,(col3_ref + 1),(col4_ref - (col3_ref + 1)))
when col3_ref > 0
then
substr(modified_name,(col3_ref + 1))
end) as unsigned) col3
, cast((case when col4_ref > 0
then
substr(modified_name,(col4_ref + 1))
end) as unsigned) col4
from
(
select t.*,substring_index(name,' ',1) modified_name
,locate('-',name,1) col1_col2_ref
,locate('/',name,1) col3_ref
,locate('/',name,locate('/',name,1)+1) col4_ref
from filing_code_management t
) t
) t
order by col1,col2,col3,col4
It shows me below the result, it cannot sort properly.
Output 1
Actually I want the output sample like below:
Output 2
Output 3
This is before I can sort the column name link, https://dbfiddle.uk/?rdbms=mysql_5.5&fiddle=6b12a4d42359cb30f27a5bfb9d0c8210. After I am inserted into new data, it cannot work for me. Maybe an example in new data like this error (R)100-6-2-2 Mesyuarat Majlis Kerajaan Negeri (MMKN) JKK if I put () in front. Or in new data like this error 100-1-1 Penggubalan/Penyediaan/Pindaan Undang-Undang/Peraturan if I put / in between the word.
Hope someone can guide me to solve this problem. Thanks.
You should be able to adapt the following code to your needs (tested at your DB Fiddle!). I've used the file_name column instead of the name column to slightly simplify building the sort fields, as it seems the file name is always repeated in the first part of the name field anyway.
This would be quite a bit simpler using regular expression support, but I note that the version of MySQL you are using doesn't have this feature (I think it arrives in SQL 8.0, if I'm not mistaken).
SELECT id,
num_hyphens,
CAST(SUBSTRING_INDEX(CONCAT(file_name_adj,'-'), '-', 1) AS UNSIGNED) AS sort1,
CAST(CASE WHEN num_hyphens = 0
THEN '0'
ELSE SUBSTRING_INDEX(SUBSTRING_INDEX(file_name_adj,'-', 2), '-',-1)
END AS UNSIGNED) AS sort2,
CAST(CASE WHEN num_hyphens <= 1
THEN '0'
ELSE SUBSTRING_INDEX(SUBSTRING_INDEX(file_name_adj,'-', 3), '-',-1)
END AS UNSIGNED) AS sort3,
CAST(CASE WHEN num_hyphens <= 2
THEN '0'
ELSE SUBSTRING_INDEX(file_name_adj, '-', -1)
END AS UNSIGNED) AS sort4,
file_name,
name
FROM (
SELECT id, name, MID(file_name, instr(file_name, ')') + 1) AS file_name_adj, file_name,
LENGTH(file_name) - LENGTH(REPLACE(file_name, '-', '')) AS num_hyphens
FROM filing_code_management
) t1
ORDER BY sort1, sort2, sort3, sort4
I have a string that contains number with separated by comma like below.
15,22,20,26,33,445,40,44,22,225,115,2
I want to know if a number say 15 is in that string or not.The problem is that 15 and 115 both are a match.Same for other number say 2, for this case 20 , 25, and 225 are match.For both cases only it should return if there is 15 or 2 in the string.I tried using like keyword but it's not working. It also return the rows with 115 or 20, 225, 222 whille matching 15 and 2 respectively. Can anyone suggest a regex pattern?
Update
I have a query like below where I was using like keyword, but I was getting wrong result for above reason.
SELECT DISTINCT A.id,A.title,A.title_hi,A.cId,B.id as cid1,A.report_type ,A.icon_img_url, A.created_at , A.news_date
FROM tfs_report_news A, tfs_commodity_master B
WHERE (',' + RTRIM(A.cId) + ',') LIKE ('%,' + B.id + ',%')
AND A.ccId = B.ccId AND A.`report_type`= "M"
AND A.isDeleted=0 AND A.isActive=1 AND B.isDeleted=0
AND B.status=1
AND A.news_date= (SELECT MAX(T.news_date)
FROM tfs_report_news T WHERE (',' + RTRIM(T.cId) + ',')
LIKE ('%,' + B.id + ',%'))
ORDER BY created_at desc, id desc limit 100;
Here tfs_report_news has the string 15,22,20,26,33,445,40,44,22,225,115,2 as column name cId and individual cId like 15 or 2 is id of tfs_commodity_master
In MySQL, what you asked for is the purpose of string function find_in_set():
Returns a value in the range of 1 to N if the string str is in the string list strlist consisting of N substrings. A string list is a string composed of substrings separated by , characters [...] Returns 0 if str is not in strlist or if strlist is the empty string. Returns NULL if either argument is NULL.
So to check if a value is present in the list, you can just do:
find_in_set('15', '15,22,20,26,33,445,40,44,22,225,115,2') > 0
Side note: here is a recommended reading.
Use FIND_IN_SET:
SELECT
CASE WHEN FIND_IN_SET('15', csv) > 0 THEN 'yes' ELSE 'no' END AS result
FROM yourTable;
Another option would be to use LIKE:
SELECT
CASE WHEN CONCAT(',', csv, ',') LIKE '%,15,%' THEN 'yes' ELSE 'no' END AS result
FROM yourTable;
Finally, you could also use REGEXP here:
SELECT
CASE WHEN csv REGEXP '[[:<:]]15[[:>:]]' THEN 'yes' ELSE 'no' END AS result
FROM yourTable;
I have a problem which I think relates to having a multiple value parameter.
In my TblActivity there are two fields TblActivity.ActivityServActId and TblActivity.ActivityContractId which I want to include in my WHERE statement.
Filtering by these is optional. If the user selects 'Yes' for the parameter #YESNOActivity, then I want to filter the query looking for rows where TblActivity.ActivityServActId matches one of the options in the parameter #ServiceActivity.
The same goes for the #YESNOContract, TblActivity.ActivityContractId and #Contract respectively
I managed to get to this:
WHERE
(CASE WHEN #YESNOActivity = 'Yes' THEN TblActivity.ActivityServActId ELSE 0 END)
IN (CASE WHEN #YESNOActivity = 'Yes' THEN #ServiceActivity ELSE 0 END)
AND (CASE WHEN #YESNOContract = 'Yes' THEN TblActivity.ActivityContractId ELSE 0 END)
IN (CASE WHEN #YESNOContract = 'Yes' THEN #Contract ELSE 0 END)
However, although this code works fine if there is only one value selected in the parameter #ServiceActivity or #Contract, as soon as I have more than one value in these parameters, I get the error:
Incorrect syntax near ','.
Query execution failed for dataset 'Activity'. (rsErrorExecutingCommand)
An error has occurred during report processing. (rsProcessingAborted)
Can anyone see what I'm doing wrong? I could understand it if I had an = instead of IN in the WHERE statement but can't figure this one out.
Using SQL Server 2008 and SSRS 2008-r2
If your #ServiceActivity is something like 1,2,3
You can do something like this
WHERE `,1,2,3,` LIKE `%,1,%`
So you format your variables
WHERE ',' + #ServiceActivity + ',' LIKE '%,' + ID + ',%'
SQL FIDDLE DEMO
SELECT *
FROM
(SELECT '1,2,3,4' as X UNION ALL
SELECT '2,3,4,5' as X UNION ALL
SELECT '3,4,5,6' as X UNION ALL
SELECT '1,3,4,5' as X
) as T
WHERE ',' + X + ',' LIKE '%,1,%'
For Your Case
(CASE WHEN #YESNOActivity = 'Yes'
THEN ',' + #ServiceActivity + ','
ELSE NULL
END)
LIKE
(CASE WHEN #YESNOActivity = 'Yes'
THEN '%,' + TblActivity.ActivityServActId + ',%'
ELSE 0
END)
In SQL, the IN clause does not support parameters the way you are using them. The general syntax is
IN (1, 2, 3, 4)
you have
IN (#Param)
where something like
#Param = '1, 2, 3, 4'
Internally, SQL will turn this into
IN ('1, 2, 3, 4')
Note the quotes... you are now matching against a string!
There are a number of ways to address this. Search SO for "sql in clause parameter", pick one that works for you, and upvote it.
(Added)
Parameterize an SQL IN clause seems pretty definitive on the subject. While long ago I upvoted the third reply (the one with table-value parameters), any of the high-vote answers could do the trick. The ideal answer depends on the overall problem you are working with. (I am not familiar with SSRS, and can't give more specific advice.)
So after a lot of messing around I put together a simple workaround for this by dropping my use of CASE altogether - but I have a suspicion that this is not a terribly efficient way of doing things.
WHERE
(#YESNOActivity = 'No' OR (#YESNOActivity = 'Yes' AND
TblActivity.ActivityServActId IN (#ServiceActivity)))
AND
(#YESNOContract = 'No' OR (#YESNOContract = 'Yes' AND
TblActivity.ActivityContractId IN (#Contract)))
I have a table which looks like this: http://i.stack.imgur.com/EyKt3.png
And I want a result like this:
Conditon COL
ted1 4
ted2 1
ted3 2
I.e., the count of the number of '1' only in this case.
I want to know the total no. of 1's only (check the table), neglecting the 0's. It's like if the condition is true (1) then count +1.
Also consider: what if there are many columns? I want to avoid typing expressions for every single one, like in this case ted1 to ted80.
Using proc means is the most efficient method:
proc means data=have noprint;
var ted:; *captures anything that starts with Ted;
output out=want sum =;
run;
proc print data=want;
run;
Try this
select
sum(case when ted1=1 then 1 else 0 end) as ted1,
sum(case when ted2=1 then 1 else 0 end) as ted2,
sum(case when ted3=1 then 1 else 0 end) as ted3
from table
In PostgreSQL (tested with version 9.4) you could unpivot with a VALUES expression in a LATERAL subquery. You'll need dynamic SQL.
This works for any table with any number of columns matching any pattern as long as selected columns are all numeric or all boolean. Only the value 1 (true) is counted.
Create this function once:
CREATE OR REPLACE FUNCTION f_tagcount(_tbl regclass, col_pattern text)
RETURNS TABLE (tag text, tag_ct bigint)
LANGUAGE plpgsql AS
$func$
BEGIN
RETURN QUERY EXECUTE (
SELECT
'SELECT l.tag, count(l.val::int = 1 OR NULL)
FROM ' || _tbl || ', LATERAL (VALUES '
|| string_agg( format('(%1$L, %1$I)', attname), ', ')
|| ') l(tag, val)
GROUP BY 1
ORDER BY 1'
FROM pg_catalog.pg_attribute
WHERE attrelid = _tbl
AND attname LIKE col_pattern
AND attnum > 0
AND NOT attisdropped
);
END
$func$;
Call:
SELECT * FROM f_tagcount('tbl', 'ted%');
Result:
tag | tag_ct
-----+-------
ted1 | 4
ted2 | 1
ted3 | 2
The 1st argument is a valid table name, possibly schema-qualified. Defense against SQL-injection is built into the data type regclass.
The 2nd argument is a LIKE pattern for the column names. Hence the wildcard %.
db<>fiddle here
Old sqlfiddle
Related:
Select columns with particular column names in PostgreSQL
SELECT DISTINCT on multiple columns
There is a SQL table mytable that has a column mycolumn.
That column has text inside each cell. Each cell may contain "this.text/31/" or "this.text/72/" substrings (numbers in that substrings can be any) as a part of string.
What SQL query should be executed to display a list of unique such substrings?
P.S. Of course, some cells may contain several such substrings.
And here are the answers for questions from the comments:
The query supposed to work on SQL Server.
The prefered output should contain the whole substring, not the numeric part only. It actually could be not just the number between first "/" and the second "/".
And it is varchar type (probably)
Example:
mycolumn contains such values:
abcd/eftthis.text/31/sadflh adslkjh
abcd/eftthis.text/44/khjgb ljgnkhj this.text/447/lhkjgnkjh
ljgkhjgadsvlkgnl
uygouyg/this.text/31/luinluinlugnthis.text/31/ouygnouyg
khjgbkjyghbk
The query should display:
this.text/31/
this.text/44/
this.text/447/
How about using a recursive CTE:
CREATE TABLE #myTable
(
myColumn VARCHAR(100)
)
INSERT INTO #myTable
VALUES
('abcd/eftthis.text/31/sadflh adslkjh'),
('abcd/eftthis.text/44/khjgb ljgnkhj this.text/447/lhkjgnkjh'),
('ljgkhjgadsvlkgnl'),
('uygouyg/this.text/31/luinluinlugnthis.text/31/ouygnouyg'),
('khjgbkjyghbk')
;WITH CTE
AS
(
SELECT MyColumn,
CHARINDEX('this.text/', myColumn, 0) AS startPos,
CHARINDEX('/', myColumn, CHARINDEX('this.text/', myColumn, 1) + 10) AS endPos
FROM #myTable
WHERE myColumn LIKE '%this.text/%'
UNION ALL
SELECT T1.MyColumn,
CHARINDEX('this.text/', T1.myColumn, C.endPos) AS startPos,
CHARINDEX('/', T1.myColumn, CHARINDEX('this.text/', T1.myColumn, c.endPos) + 10) AS endPos
FROM #myTable T1
INNER JOIN CTE C
ON C.myColumn = T1.myColumn
WHERE SUBSTRING(T1.MyColumn, C.EndPos, 100) LIKE '%this.text/%'
)
SELECT DISTINCT SUBSTRING(myColumn, startPos, EndPos - startPos)
FROM CTE
Having a table named test with the following data:
COLUMN1
aathis.text/31/
this.text/1/
bbbthis.text/72/sksk
could this be what you are looking for?
select SUBSTR(COLUMN1,INSTR(COLUMN1,'this.text', 1 ),INSTR(COLUMN1,'/',INSTR(COLUMN1,'this.text', 1 )+10) - INSTR(COLUMN1,'this.text', 1 )+1) from test;
result:
this.text/31/
this.text/1/
this.text/72/
i see your problem:
Assume the same table as above but now with the following data:
this.text/77/
xxthis.text/33/xx
xthis.text/11/xxthis.text/22/x
xthis.text/1/x
The following might help you:
SELECT SUBSTR(COLUMN1, INSTR(COLUMN1,'this.text', 1 ,1), INSTR(COLUMN1,'/',INSTR(COLUMN1,'this.text', 1 ,1)+10) - INSTR(COLUMN1,'this.text', 1 ,1)+1) FROM TEST
UNION
SELECT CASE WHEN (INSTR(COLUMN1,'this.text', 1,2 ) >0) THEN
SUBSTR(COLUMN1, INSTR(COLUMN1,'this.text', 1,2 ), INSTR(COLUMN1,'/',INSTR(COLUMN1,'this.text', 1 ,2),2) - INSTR(COLUMN1,'this.text', 1,2 )+1) end FROM TEST;
it will generate the following result:
this.text/1/
this.text/11/
this.text/22/
this.text/33/
this.text/77/
The downside is that you need to add a select statement for every occurance you might have of "this.text". If you might have 100 "this.text" in the same cell it might be a problem.
SQL> select SUBSTR(column_name,1,9) from tablename;
column_name
this.text
SELECT REGEXP_SUBSTR(column_name,'this.text/[[:digit:]]+/')
FROM table_name