I'd like to create a SQL subquery something like
(select *
from table t
where abc is true) as query_one;
select *
from query_one
group by abc
However, I keep running into syntax errors with trying to alias query_one... what's the right way to do this?
You can use a CTE:
with query_one as (
select *
from table t
where abc is true
)
select abc, count(*)
from query_one
group by abc;
Note that select * and group by do not belong together. This should be generating a syntax error.
Sounds like you're trying to create a view:
CREATE VIEW query_one AS
SELECT *
FROM t
WHERE abc = true
try this
select * from
(select *
from table t
where abc is true) query_one
group by abc
Related
WITH 1_hour_trips as (
SELECT *
from bigquery-public-data.new_york.citibike_trips
where tripduration = 60
)
WITH creates a temporary view, and it then expects you to use a select to actually get the result you want. Something like this:
WITH 1_hour_trips as (
SELECT * from bigquery-public-data.new_york.citibike_trips
where tripduration = 60
)
SELECT * from 1_hour_trips;
hey guys this is a very simple sql query that is not giving me the correct result.
subquery:
SELECT NEODB2ADMIN.ORDERS.MEMBER_ID
FROM NEODB2ADMIN.ORDERS
WHERE NEODB2ADMIN.ORDERS.ORDERS_ID = 6371043
this subquery successfully returns a correct value 627809
simple query:
SELECT *
FROM NEODB2ADMIN.ADDRESS
WHERE MEMBER_ID IN (627809)
this query executes properly and returns 4 rows.(4 addresses for a member)
but if I try to combine these queries in 1 query as follows:
SELECT *
FROM NEODB2ADMIN.ADDRESS
WHERE MEMBER_ID IN (
SELECT NEODB2ADMIN.ORDERS.MEMBER_ID
FROM NEODB2ADMIN.ORDERS
WHERE NEODB2ADMIN.ORDERS.ORDERS_ID = 6371043
)
then the query returns 0 rows. why is this happening?
Thanks
Your query looks OK, the only I can think is maybe you mistake the value on the result.
can you try this:
SELECT *
FROM NEODB2ADMIN.ADDRESS
WHERE MEMBER_ID IN (
SELECT 627809
FROM NEODB2ADMIN.ORDERS
WHERE NEODB2ADMIN.ORDERS.ORDERS_ID = 6371043
)
and this
SELECT *
FROM NEODB2ADMIN.ADDRESS
WHERE MEMBER_ID IN (
SELECT 627809
FROM NEODB2ADMIN.ORDERS
)
Since your Order (presumably) can only carry a single Member_ID -- can you please try your full query without the "IN", rather try an equal join as follows:
SELECT *
FROM NEODB2ADMIN.ADDRESS
WHERE MEMBER_ID = (
SELECT NEODB2ADMIN.ORDERS.MEMBER_ID
FROM NEODB2ADMIN.ORDERS
WHERE NEODB2ADMIN.ORDERS.ORDERS_ID = 6371043
)
I need to select records that has ID = 10,23,30 so I wrote this SQL
Select * from mytable where position(id in '10,23,30') > 0
But the problem I get additional records where ID = 1 and 2
Any ideas how to select only what I need ?
No need for position, just do IN:
Select * from mytable
where id in (10,23,30)
Use IN operator:
Select * from mytable where id in (10,23,30)
I have a SQL select statement which is comparing two tables. I am getting the values where the rows are the same. Now I have got this in the procedure I need to add these into a new table (coftReconciliationMatches). The table has all the same columns but one additional one 'MatchOrNoMatch'. I need to pass through the values of the row that are matched and also need to pass through 'Match' to the column 'MatchOrNoMatch'
This is the current part of the SQL script I have;
SELECT *
FROM dbo.coftReconciliationFileInfo AS a
WHERE EXISTS (SELECT *
FROM dbo.coftPreReconciliationInfo AS b
WHERE a.Rec_PK = b.Rec_PK
AND a.ExtRef1 = b.ExtRef1
AND a.SedolRef = b.SedolRef
AND a.ValLatest = b.ValLatest
AND a.Totunits = b.Totunits
AND a.FundsOrCash = b.FundsOrCash )
When comparing a lot of columns, the SELECT INTERSECT and SELECT EXCEPT commands can save you a lot of effort:
INSERT dbo.coftReconcilliationMatches
(Rec_PK, ExtRef1, SedolRef, ValLatest, Totunits, FundsOrCash, MatchOrNoMatch)
select Rec_PK, ExtRef1, SedolRef, ValLatest, Totunits, FundsOrCash, 'Match'
from dbo.coftReconciliationFileInfo
intersect select Rec_PK, ExtRef1, SedolRef, ValLatest, Totunits, FundsOrCash, 'Match'
from dbo.coftPreReconciliationFileInfo
(Check for typos!)
If you are creating the table on the fly (something I wouldn't recommend doing), you'd use SELECT INTO.
INSERT INTO [table] ([col1], [col2]) SELECT colx, ...
Use Select Into for this. See here http://www.w3schools.com/sql/sql_select_into.asp
Try something like:
INSERT INTO <your table> (<list of columns>)
SELECT <list of columns from select>, '<the additional column>' FROM dbo.coftReconciliationFileInfo AS a
WHERE EXISTS(SELECT * FROM dbo.coftPreReconciliationInfo AS b
WHERE a.Rec_PK = b.Rec_PK AND a.ExtRef1 = b.ExtRef1 AND a.SedolRef = b.SedolRef AND a.ValLatest = b.ValLatest AND a.Totunits = b.Totunits AND a.FundsOrCash = b.FundsOrCash )
also see http://www.1keydata.com/sql/sqlinsert.html
you need to do:
INSERT INTO Table (column1, column2..)
(SELECT column1, column2 ....
FROM dbo.coftReconciliationFileInfo AS a
WHERE EXISTS (SELECT *
FROM dbo.coftPreReconciliationInfo AS b
WHERE a.Rec_PK = b.Rec_PK
AND a.ExtRef1 = b.ExtRef1
AND a.SedolRef = b.SedolRef
AND a.ValLatest = b.ValLatest
AND a.Totunits = b.Totunits
AND a.FundsOrCash = b.FundsOrCash ))
I have a sql query that I run against a sql server database eg.
SELECT * FROM MyTable WHERE Id = 2
This may return a number of records or may return none. If it returns none, I would like to alter my sql query to return a default record, is this possible and if so, how? If records are returned, the default record should not be returned. I cannot update the data so will need to alter the sql query for this.
Another way (you would get an empty initial rowset returned);
SELECT * FROM MyTable WHERE Id = 2
IF (##ROWCOUNT = 0)
SELECT ...
SELECT TOP 1 * FROM (
SELECT ID,1 as Flag FROM MyTable WHERE Id = 2
UNION ALL
SELECT 1,2
) qry
ORDER BY qry.Flag ASC
You can have a look to this post. It is similar to what you are asking
Return a value if no rows are found SQL
I hope that it can guide you to the correct path.
if not exists (SELECT top 1 * FROM mytable WHERE id = 2)
select * from mytable where id= 'whatever_the_default_id_is'
else
select * from mytable where id = 2
If you have to return whole rows of data (and not just a single column) and you have to create a single SQL query then do this:
Left join actual table to defaults single-row table
select
coalesce(a.col1, d.col1) as col1,
coalesce(a.col2, d.col2) as col2,
...
from (
-- your defaults record
select
default1 as col1,
default2 as col2,
...) as d
left join actual as a
on ((1 = 1) /* or any actual table "where" conditions */)
The query need to return the same number of fields, so you shouldn't do a SELECT * FROM but a SELECT value FROM if you want to return a default value.
With that in mind
SELECT value FROM MyTable WHERE Id = 2
UNION
SELECT CASE (SELECT count(*) FROM MyTable WHERE Id = 2)
WHEN 0 THEN 'defaultvalue'
END