I am using the below query where minDaysToDeparture and maxDaysToDeparture are string but I have to put in the where block with comparison operators.
I have tried the below queries (not working):
SELECT *
FROM Rules
WHERE (
AND ( minDaysToDeparture<='8' )
AND ( maxDaysToDeparture>='8' )
AND status = '1' )
SELECT *
FROM Rules
WHERE (
AND ( '5'<='8' )
AND ( '10'>='8' )
AND status = '1' )
The below query works, but somehow I cannot change type of '8' it has to remain string. But if there is any toNumber method then I can use it without any issue.
SELECT *
FROM Rules
WHERE (
AND ( 5<=8 )
AND ( 10>=8 )
AND status = '1' )
Looking forward to your help.
Thanks!
Related
I have sample data as
with temp_table as
(
select "/category/sub-category/title-of-the-page" as pagename
union all
select "premier-league/splash"
union all
select "portal"
union all
select "news/1970/01/01/new-billion"
union all
select "/premier-league/transfers/"
union all
select "/premier-league/tfflive"
)
, clean_pagename as
(
select * ,
if (regexp_contains(pagename, "^/+" ) , regexp_extract(pagename, "^/+(.*)/?$") , pagename) as clean_page
from temp_table
)
, dated_content as
(
select *, if (
regexp_contains(clean_page , "/[0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]/") ,
regexp_replace(clean_page , "[0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]", "dated-content" ),
clean_page
) as new_pagename
from clean_pagename
)
,category_and_titles as
(
select *, split(new_pagename, "/")[offset(0)] as page_category,
coalesce(REGEXP_EXTRACT(new_pagename, r'/([^/]+)?$') , "no-title") as title,
regexp_replace(new_pagename, r'[^/]+$', "") as path
from dated_content
)
select pagename,
page_category ,
path,
title
from category_and_titles
Here is what I am doing - I remove the first / in the string and replace date-content using a regex. Next I would like to extract 3 things
category - first section of the string before first /
path - that component of string from 0 until last / has been encountered
title - everything after last / in the string.
There are instances where / is not present at all (record #3). In this case I want all the 3 parts to be equal to original string.
For example - for string as /premier-league/transfers/, I would like my output to be -
category = "premier-league" , path = "premier-league/transfers/" , title = ""
My current code gives me results as
Whereas, I need -
Without much refactoring and leaving all your original logic intact - just do below changes for category_and_titles CTE
...
, category_and_titles AS (
SELECT *,
SPLIT(new_pagename, "/")[OFFSET(0)] AS page_category,
IF(REGEXP_CONTAINS(new_pagename, r'/'), REGEXP_REPLACE(new_pagename, r'[^/]+$', ""), new_pagename) AS path,
IF(REGEXP_CONTAINS(new_pagename, r'/'), COALESCE(REGEXP_EXTRACT(new_pagename, r'/([^/]+)?$'), "no-title"), new_pagename) AS title
FROM dated_content
)
...
with this minor change result will be as expected
I'm creating a view in MariaDB and i'm having trouble making it work for a couple of fields. Currently this is working:
( SELECT DISTINCT IFNULL(grades.`grade`,'No Grade')
FROM `table` grades
WHERE userinfo.`id` = grades.`id`
AND grades.`Item Name` = 'SOMEINFO'
) 'SOMENAME',
But i need to add a select where the 'No grade' is, in the following form
( SELECT DISTINCT IFNULL( grades.`grade`,
SELECT IF( EXISTS
( SELECT *
FROM `another_table`
WHERE userid = 365
AND courseid = 2
), 'Enrolled', 'Not enrolled'
)
)
FROM `table` grades
WHERE userinfo.`id` = grades.`id`
AND grades.`Item Name` = 'SOMEINFO'
) 'SOMENAME',
i know that
SELECT IF( EXISTS( SELECT *
FROM `another_table`
WHERE userid = 365
AND courseid = 2
),
'Enrolled', 'Not enrolled'
)
is working too, but now the whole thing it's giving me an error, so any suggestions would be greatly appreciated
Thanks
This looks like a subquery:
(SELECT DISTINCT IFNULL(grades.`grade`,
SELECT IF( EXISTS (SELECT *
FROM `another_table`
WHERE userid = 365 AND courseid = 2
), 'Enrolled', 'Not enrolled'
)
)
FROM `table` grades
WHERE userinfo.`id` = grades.`id` AND
grades.`Item Name` = 'SOMEINFO'
) as SOMENAME,
You are using a subquery that returns two columns in a position where a scalar subquery is expected. A scalar subquery returns one column in at most one row.
Unfortunately, there is no easy way to do what you want in MySQL, because of the restrictions on views. I would advise you to rewrite the logic so the exists is handled using a left join in the from clause.
I have searched this question here but couldn't find it, please redirect me if we already have it on the site.
I'm looking for a way to create CTE which uses another CTE as the data to further limit. I have a CTE which creates a report for me , but I would like to narrow this report with another input using the existing CTE.
I hope my question is clear.
You can chain 2 (or more) CTE's together.
For example
with ObjectsWithA as
(
select * from sys.objects
where name like '%A%'
),
ObjectsWithALessThan100 as
(
select * from ObjectsWithA
where object_id < 100
)
select * from ObjectsWithALessThan100;
Or the same example, with more "spelled out" names/aliases:
with ObjectsWithA (MyObjectId , MyObjectName) as
(
select object_id as MyObjIdAlias , name as MyNameAlias
from sys.objects
where name like '%A%'
),
ObjectsWithALessThan100 as
(
select * from ObjectsWithA theOtherCte
where theOtherCte.MyObjectId < 100
)
select lessThan100Alias.MyObjectId , lessThan100Alias.MyObjectName
from ObjectsWithALessThan100 lessThan100Alias
order by lessThan100Alias.MyObjectName;
A CTE can refer to previous CTEs:
with report as (
<your query here>
),
reportLimited as (
select *
from report
where foo = #bar
)
select *
from reportLimited
The only rule is that the references have to be sequential. No forward references.
Sure, just reference the CTE directly:
WITH Source As
(
SELECT * FROM AllData
),
Filtered AS
(
SELECT * FROM Source WHERE ID = 4
)
SELECT * FROM Filtered
WITH
Source ---------1---------
As
(
SELECT * FROM emp
),
destination----2----------
AS
(
SELECT *
FROM Source
WHERE E_id = 4
)
SELECT * FROM destination
I need help as to how to convert this select to a delete statement.
SELECT stud_term_sum_div.id_num,
stud_term_sum_div.hrs_enrolled,
stud_term_sum_div.transaction_sts,
student_crs_hist.crs_cde,
student_crs_hist.transaction_sts
FROM stud_term_sum_div,
student_crs_hist
WHERE ( stud_term_sum_div.yr_cde = student_crs_hist.yr_cde ) and
( stud_term_sum_div.trm_cde = student_crs_hist.trm_cde ) and
( stud_term_sum_div.id_num = student_crs_hist.id_num ) and
( ( stud_term_sum_div.yr_cde = '2013' ) AND
( stud_term_sum_div.trm_cde = 'FA' ) AND
( stud_term_sum_div.hrs_enrolled >= 3.00 ) AND
( student_crs_hist.transaction_sts = 'D' ) )
The most straight-forward conversion is below:
DELETE * FROM stud_term_sum_div
WHERE ( stud_term_sum_div.yr_cde = student_crs_hist.yr_cde ) and
( stud_term_sum_div.trm_cde = student_crs_hist.trm_cde ) and
( stud_term_sum_div.id_num = student_crs_hist.id_num ) and
( ( stud_term_sum_div.yr_cde = '2013' ) AND
( stud_term_sum_div.trm_cde = 'FA' ) AND
( stud_term_sum_div.hrs_enrolled >= 3.00 ) AND
( student_crs_hist.transaction_sts = 'D' ) )
BUT, before you go executing that, please check that the WHERE clause really contains the conditions to be used for deletion. Note that this SQL statement will delete the entire row (a/k/a record) when the attributes in the WHERE clause satisfy the stated conditions.
If you only want to remove the data from the attributes (as opposed to the entire record), you'd need to use an SQL UPDATE statement instead. The (simplified) syntax for that is as follows:
UPDATE <table_name>
SET <attribute1> = <value1>
[, SET <attribute_n> = <value_n>...]
WHERE <conditions on which the record should be updated>
Doing a search on Bing, google, <insert your favorite search engine here> for "SQL DELETE" or "SQL UPDATE" should get you all the information you need (e.g. MSDN, for one).
select
<here I have functions like to_char, nvl, rtrim, ltrim, sum, decode>
from
table1
table2
where
joining conditions 1
joining conditions 2
group by
<here I have functions like to_char, nvl, rtrim, ltrim, sum, decode>
I got this query from production and looking at it need to provide few solutions to tune, I m thinking of using function based inbex for group by columns. I think select columns need not be index. I will get enviornment in couple of days but before that I need to come up with different apporaches. What all things I need to check if function by index is useful? Also, apart from explain plan which other documents I need to ask from DBAs?
I m adding actual sql here, I have asked for explain plan, which I will get in sometime :-
SELECT
D_E_TRADE.DATE_VALUE,
to_char(D_E_TRADE.DATE_VALUE,'Mon-yyyy'),
NVL(P_DIM.P_NAME,' '),
rtrim(ltrim(P_DIM.C_CTRY)),
D_E_TRADE.YEAR,
L_E_DIM.L_CODE,
NVL(D_DIM.DESCR,' '),
( decode(D_DIM.DEPT_ID,'-1',' ',D_DIM.DEPT_ID) ),
sum(A_CGE.TOTAL_CALC_NET_FEES),
L_E_DIM.L_NAME,
decode(A_CGE.E_M_CENTER,-9,0,A_CGE.E_M_CENTER),
NVL(F_DIM.S_DESC,'-1'),
sum(A_CGE.C_TOTAL_SHARES)
FROM
DATE_D D_E_TRADE,
P_DIM,
L_E_DIM,
D_DIM,
A_CGE,
F_DIM
WHERE
( D_E_TRADE.DATE_KEY=A_CGE.T_KEY )
AND ( P_DIM.PARTY_KEY=A_CGE.E_P_KEY )
AND ( F_DIM.F_T_KEY=A_CGE.F_T_KEY )
AND ( L_E_DIM.L_E_KEY=A_CGE.L_E_KEY )
AND ( D_DIM.DEPT_KEY=A_CGE.DEPT_KEY )
AND
(
rtrim(ltrim(P_DIM.C_CTRY)) = 'AC'
AND
( A_CGE.T_KEY >= (SELECT DATE_D_PROMPTS.DATE_KEY FROM DATE_D DATE_D_PROMPTS WHERE ( DATE_D_PROMPTS.DATE_VALUE = '01-01-2012 00:00:00' ) )
AND
A_CGE.T_KEY <= (SELECT DATE_D_PROMPTS.DATE_KEY FROM DATE_D DATE_D_PROMPTS WHERE ( DATE_D_PROMPTS.DATE_VALUE = '31-08-2012 00:00:00' ))
AND
A_CGE.TRANS_REGION_KEY IN (SELECT REGION_KEY FROM REGION_DIM WHERE REGION_DIM.REGION_NAME IN ('Americas') ) )
AND
( A_CGE.T_KEY >= (SELECT DATE_D_PROMPTS.DATE_KEY FROM DATE_D DATE_D_PROMPTS WHERE ( DATE_D_PROMPTS.DATE_VALUE = '01-01-2012 00:00:00' ) )
AND
A_CGE.T_KEY <= (SELECT DATE_D_PROMPTS.DATE_KEY FROM DATE_D DATE_D_PROMPTS WHERE ( DATE_D_PROMPTS.DATE_VALUE = '31-08-2012 00:00:00' ))
AND
A_CGE.TRANS_REGION_KEY IN (SELECT REGION_KEY FROM REGION_DIM WHERE REGION_DIM.REGION_NAME IN ('Americas') ) )
AND
( 'All Fees' IN ('2 - E','3 - P','4 - F','5 - C,') OR A_CGE.F_T_KEY IN (SELECT F_T_KEY FROM F_DIM WHERE (F_DIM.s_id ) || ' - ' || ( F_DIM.CHARGE_LVL1_NAME ) IN ('2 - E','3 - P','4 - F','5 - C')) )
)
GROUP BY
D_E_TRADE.DATE_VALUE,
to_char(D_E_TRADE.DATE_VALUE,'Mon-yyyy'),
NVL(P_DIM.P_NAME,' '),
rtrim(ltrim(P_DIM.C_CTRY)),
D_E_TRADE.YEAR,
L_E_DIM.L_CODE,
NVL(D_DIM.DESCR,' '),
( decode(D_DIM.DEPT_ID,'-1',' ',D_DIM.DEPT_ID) ),
L_E_DIM.L_NAME,
decode(A_CGE.E_M_CENTER,-9,0,A_CGE.E_M_CENTER),
NVL(F_DIM.S_DESC,'-1')
Generaly, indexes help you on fast retrieval of data when you have filtering conditions wich may use the indexes.
(Another case whold be when you retrieve only column that are in the index, so the engine does not need to read anything from table)
In your case, you may need indexes on filtering/join conditions in the following part:
joining conditions 1
joining conditions 2
But keep in mind. If the you get more than 15%-20% of rows of a table, is better to read from table, not to use the index. That is, the index may not be used.