Is it possible to compare the result of a query to a string in MySQL? Something like :
select case when 'Captain' = (select role from roleassociation ra
inner join users urs
on ra.userentityid = urs.invuserid
where invuserid = 007)
then 'true' else 'false' end as result;
The above query is incorrect, but is it possible to implement? Thanks in advance.
I would probably just put the CASE expression in the subquery:
SELECT
CASE WHEN role = 'Captain' THEN 'true' ELSE 'result' END AS result
FROM roleassociation ra
INNER JOIN users urs
ON ra.userentityid = urs.invuserid
WHERE
invuserid = 007;
Assuming you expect the result to be only a single record, you will still have just a single result with this approach.
Related
SQL Query
sessionFactory.getCurrentSession().createSQLQuery("select claim.encounterId, claim.claimUniqID, patientmaster.FirstName, tbl_insurance.insurance_name, claim.status from rcmdb.claim join rcmdb.encounter on claim.encounterID=encounter.encounterID join rcmdb.insurance_details on encounter.insuranceDetailsID=insurance_details.insuranceDetailsID
join rcmdb.tbl_insurance on insurance_details.insurance=tbl_insurance.insurance_id
join rcmdb.patientmaster onpatientmaster.patientMasterID=encounter.patientMasterID
where createdByDate between'"+from+"' and '"+to+"'").list();
i want to return string values based on claim.status values like if the status is 1 accepted, in output I want the string values how can I write the query?
You can use CASE statement. https://www.w3schools.com/sql/func_mysql_case.asp
SELECT CASE
WHEN status =1 THEN STRING
ELSE NULL
END
Put a table in the database that maps the int to the string and join it:
ClaimStatus
--------------
ID, StatusDescription
1, Accepted
2, Rejected
SELECT c.PolicyNumber, c.ClaimValue, cs.StatusDescription
FROM
claims c
INNER JOIN claimstatus cs ON c.ClaimStatusId = cs.ID
I have a table with 3 columns( name, objectroot_dn, distinguishedname). Here distinguishedname is like a parent to objectroot_dn. I have to find whether for each objectroot_dn is there a child exists or not?
I can do this using the query below. It will return True if there is a child, False if there is not. But my problem is when the total dataset gets increased it takes lots of time.
For example, If the total number of row is 50,000 then it takes 10 mins for this query to complete.
Since I'm using a framework for different database, I can't index the columns.
SELECT
name,
objectroot_dn,
distinguishedname,
CASE
WHEN (SELECT count(*)
FROM (SELECT name
FROM elaoucontainergeneraldetails
WHERE objectroot_dn = dn.distinguishedname
LIMIT 1) AS tabel1) > 0
THEN 'True'
ELSE 'False'
END
FROM elaoucontainergeneraldetails AS dn
WHERE objectroot_dn = 'SOME_VALUE';
Please let me know how can I increase the speed of this query.
Thanks in advance. Appreciate all help.
You can have the same solution using left join or exists:
SELECT
dn.name,
dn.objectroot_dn,
dn.distinguishedname,
CASE
WHEN dn_in.objectroot_dn is not null
THEN 'True'
ELSE 'False'
END
FROM elaoucontainergeneraldetails AS dn
LEFT JOIN elaoucontainergeneraldetails dn_in on dn_in.objectroot_dn = dn.distinguishedname
WHERE objectroot_dn = 'SOME_VALUE';
EXISTS(subquery) yields a boolean value:
SELECT dn.name
, dn.objectroot_dn
, dn.distinguishedname
, EXISTS (SELECT *
FROM elaoucontainergeneraldetails nx
WHERE nx.objectroot_dn = dn.distinguishedname
) AS truth_value
FROM elaoucontainergeneraldetails AS dn
WHERE dn.objectroot_dn = 'SOME_VALUE'
;
I would like to use if statement in sql query :
what I want :
if(tractions_delivery.send_date_id !=0 ){
date_send_commodities.id = tractions_delivery.send_date_id
}
my query :
from
tractions_delivery,user_address,province,city,date_send_commodities,users
WHERE
tractions_delivery.tr_id = $tr_id
AND
tractions_delivery.address_id = user_address.id
AND
user_address.province_id = province.id
AND
user_address.city_id = city.id
AND
//not work
(tractions_delivery.send_date_id IS NOT 0 date_send_commodities.id = tractions_delivery.send_date_id)
AND
users.id = user_address.user_id
You could use the CASE-statement
SELECT
*
FROM
tractions_delivery,
user_address,
province,
city,
date_send_commodities,users
WHERE
tractions_delivery.tr_id = $tr_id AND
tractions_delivery.address_id = user_address.id AND
user_address.province_id = province.id AND
user_address.city_id = city.id AND
CASE WHEN tractions_delivery.send_date_id != 0 THEN date_send_commodities.id = tractions_delivery.send_date_id ELSE 1=1 END AND
users.id = user_address.user_id
You can only use if statements in stored procedures or functions. If you just write a sql statement unfortunately you cannot use if statements around the query. But you can use logic in the query itself, e.g.:
SELECT CASE WHEN col1 = col2 THEN'col1 equals col2' else 'col1 doesnt equal col2' ELSE
FROM table1
So around doesnt work, but in the field list you can create CASE WHEN ELSE END logic.
CASE or IF() operators can be of help.
Examples,
SELECT (CASE 1 WHEN 1 THEN 'One' WHEN 2 THEN 'Two' ELSE 'More' END) 'Result';
OR
SELECT IF(1=1, 'One', 'Two') 'Result';
These CASE and IF() operators can be used in the SELECT clause to conditionally interpret column values and return in the resultset.
Note: Do not confuse CASE operator here with 'CASE conditional syntax block' that ends with END CASE.
I'm facing a problem and I'm not finding the answer. I'm querying a MySql table during my java process and I would like to exclude some rows from the return of my query.
Here is the query:
SELECT
o.offer_id,
o.external_cat,
o.cat,
o.shop,
o.item_id,
oa.value
FROM
offer AS o,
offerattributes AS oa
WHERE
o.offer_id = oa.offer_id
AND (cat = 1200000 OR cat = 12050200
OR cat = 13020304
OR cat = 3041400
OR cat = 3041402)
AND (oa.attribute_id = 'status_live_unattached_pregen'
OR oa.attribute_id = 'status_live_attached_pregen'
OR oa.attribute_id = 'status_dead_offer_getter'
OR oa.attribute_id = 'most_recent_status')
AND (oa.value = 'OK'
OR oa.value='status_live_unattached_pregen'
OR oa.value='status_live_attached_pregen'
OR oa.value='status_dead_offer_getter')
The trick here is that I need the value to be 'OK' in order to continue my process but I don't need mysql to return it in its response, I only need the other values to be returned, for the moment its returning two rows by query, one with the 'OK' value and another with one of the other values.
I would like the return value to be like this:
'000005261383370', '10020578', '1200000', '562', '1000000_157795705', 'status_live_attached_pregen'
for my query, but it returns:
'000005261383370', '10020578', '1200000', '562', '1000000_157795705', 'OK'
'000005261383370', '10020578', '1200000', '562', '1000000_157795705', 'status_live_attached_pregen'
Some help would really be appreciated.
Thank you !
You can solve this with an INNER JOIN on the self I think:
SELECT o.offer_id
,o.external_cat
,o.cat
,o.shop
,o.item_id
,oa.value
FROM offer AS o
INNER JOIN offerattributes AS oa
ON o.offer_id = oa.offer_id
INNER JOIN offerattributes AS oaOK
ON oaOK.offer_id = oa.offer_id
AND oaOK.value = 'OK'
WHERE o.cat IN (1200000,12050200,13020304,3041400,3041402)
AND oa.attribute_id IN ('status_live_unattached_pregen','status_live_attached_pregen','status_dead_offer_getter','most_recent_status')
AND oa.value IN ('status_live_unattached_pregen','status_live_attached_pregen','status_dead_offer_getter');
By doing a self-JOIN with the restriction of value OK, it will limit the result set to offer_ids that have an OK response, but the WHERE clause will still retrieve the values you need. Based on your description, I think this is what you were looking for.
I also converted your implicit cross JOIN to an explicit INNER JOIN, as well as changed your ORs to IN, should be more performant this way.
I want to write a select statement that should filter data based on wildcard characters. I have written something like this but it doesn't serve my purpose:
Select r.CompanyID,r.Description,c.BusinessUnitID,c.BusinessSourceID as BusinessSrcID,
c.Description as BusinessDesc from RCompanyTable r
join CBusinessUnitTable c on r.CompanyID=c.CompanyID
WHERE r.CompanyID like CASE WHEN COALESCE('Regexp(*)', '') = '' THEN r.CompanyID ELSE 'Company2' END
But in this it always executes the else part.
What i am looking for is it should give me all data when i pass * to the condition.
Since in my RCompanyTable i have two records Company1 and Company2, I want that if i pass * in that query then it should return me both company1 and company2 data but if i pass regexp(any1) it should provide me Comapany1 Data and if both conditions are not true then it should go to else part displaying Company2 data
Looking forward to your answer.
Thanks in advance
I don't know exactly what you want with * and regexp(any1), but assuming that they are constant strings, then this query should work:
SET #parameter = '';
Select r.CompanyID
, r.Description
, c.BusinessUnitID
, c.BusinessSourceID AS BusinessSrcID
, c.Description AS BusinessDesc
FROM RCompanyTable r
JOIN CBusinessUnitTable c ON r.CompanyID = c.CompanyID
WHERE (#parameter LIKE '%*%' AND r.CompanyID IN ('Company1', 'Company2'))
OR (#parameter LIKE 'regexp(any1)' AND r.CompanyID = 'Company1')
OR (#parameter NOT IN ('%*%', 'regexp(any1)') AND r.CompanyID = 'Company2')
The #parameter is what you are going to pass in the query.
WHERE r.CompanyID = CASE WHEN r.CompanyId LIKE '%*%' THEN r.CompanyID ELSE 'Company2' END
This where clause returns all records where companyID has a * in it, or the companyID is Company2. Is this what you are after?