I have this (3 int columns in one table)
Int1 Int2 Int3
---------------
1 2 3
I would like to run such query with another someTable:
SELECT * FROM someTable WHERE someInt NOT IN (1,2,3)
where 1,2,3 are list of INTs converted to a list that I can use with SELECT * NOT IN statement
Any suggestions how to achieve this without stored procedures in Micorosft SQL Server 2019 ?
If you want rows in some table that are not in one of three columns of another table, then use not exists:
select t.*
from sometable t
where not exists (select 1
from t t2
where t.someint in (t2.int1, t2.int2, t2.int3)
);
The subquery returns a row where there is a match. The outer query then rejects any rows with a match.
Seems like you actually want a NOT EXISTS?
SELECT {Your Columns}
FROM dbo.someTable sT
WHERE NOT EXISTS (SELECT 1
FROM dbo.oneTable oT
WHERE sT.someInt NOT IN (oT.int1,oT.int2,oT.int3));
An alternative method would be to unpivot the data, and then use an equality operator:
SELECT {Your Columns}
FROM dbo.someTable sT
WHERE NOT EXISTS (SELECT 1
FROM dbo.oneTable oT
CROSS APPLY (VALUES(oT.int1),(oT.int2),(oT.int3))V(I)
WHERE V.I = sT.someInt);
Related
I am writing a HIVE query to pull about 2,000 unique keys from a table.
I keep getting this error - java.lang.StackOverflowError
My query is basic but looks like this:
SELECT * FROM table WHERE (Id = 1 or Id = 2 or Id = 3 Id = 4)
my WHERE clause goes all the way up to 2000 unique id's and I receive the error above. Does anyone know of a more efficient way to do this or get this query to work?
Thanks!
You may use the SPLIT and EXPLODE to convert the comma separated string to rows and then use IN or EXISTS.
using IN
SELECT * FROM yourtable t WHERE
t.ID IN
(
SELECT
explode(split('1,2,3,4,5,6,1998,1999,2000',',')) as id
) ;
Using EXISTS
SELECT * FROM yourtable t WHERE
EXISTS
(
SELECT 1 FROM (
SELECT
explode(split('1,2,3,4,5,6,1998,1999,2000',',')) as id
) s
WHERE s.id = t.id
);
Make use of the Between clause instead of specifying all unique ids:
SELECT ID FROM table WHERE ID BETWEEN 1 AND 2000 GROUP BY ID;
i you can create a table for these IDs and after use the condition of exist in the new table to get only your specific IDs
The question I asked yesterday was simplified but I realize that I have to report the whole story.
I have to extract the data of 4 from 4 different tables into a Firebird 2.5 database and the following query works:
SELECT
PRODUZIONE_T t.CODPRODUZIONE,
PRODUZIONE_T.NUMEROCOMMESSA as numeroco,
ANGCLIENTIFORNITORI.RAGIONESOCIALE1,
PRODUZIONE_T.DATACONSEGNA,
PRODUZIONE_T.REVISIONE,
ANGUTENTI.NOMINATIVO,
ORDINI.T_DATA,
FROM PRODUZIONE_T
LEFT OUTER JOIN ORDINI_T ON PRODUZIONE_T.CODORDINE=ORDINI_T.CODORDINE
INNER JOIN ANGCLIENTIFORNITORI ON ANGCLIENTIFORNITORI.CODCLIFOR=ORDINI_T.CODCLIFOR
LEFT OUTER JOIN ANGUTENTI ON ANGUTENTI.IDUTENTE = PRODUZIONE_T.RESPONSABILEUC
ORDER BY right(numeroco,2) DESC, left(numeroco,3) desc
rows 1 to 500;
However the query returns me double (or more) due to the REVISIONE column.
How do I select only the rows of a single NUMEROCOMMESSA with the maximum REVISIONE value?
This should work:
select COD, ORDER, S.DATE, REVISION
FROM TAB1
JOIN
(
select ORDER, MAX(REVISION) as REVISION
FROM TAB1
Group By ORDER
) m on m.ORDER = TAB1.ORDER and m.REVISION = TAB1.REVISION
Here you go - http://sqlfiddle.com/#!6/ce7cf/4
Sample Data (as u set it in your original question):
create table TAB1 (
cod integer primary key,
n_order varchar(10) not null,
s_date date not null,
revision integer not null );
alter table tab1 add constraint UQ1 unique (n_order,revision);
insert into TAB1 values ( 1, '001/18', '2018-02-01', 0 );
insert into TAB1 values ( 2, '002/18', '2018-01-31', 0 );
insert into TAB1 values ( 3, '002/18', '2018-01-30', 1 );
The query:
select *
from tab1 d
join ( select n_ORDER, MAX(REVISION) as REVISION
FROM TAB1
Group By n_ORDER ) m
on m.n_ORDER = d.n_ORDER and m.REVISION = d.REVISION
Suggestions:
Google and read the classic book: "Understanding SQL" by Martin Gruber
Read Firebird SQL reference: https://www.firebirdsql.org/file/documentation/reference_manuals/fblangref25-en/html/fblangref25.html
Here is yet one more solution using Windowed Functions introduced in Firebird 3 - http://sqlfiddle.com/#!6/ce7cf/13
I do not have Firebird 3 at hand, so can not actually check if there would not be some sudden incompatibility, do it at home :-D
SELECT * FROM
(
SELECT
TAB1.*,
ROW_NUMBER() OVER (
PARTITION BY n_order
ORDER BY revision DESC
) AS rank
FROM TAB1
) d
WHERE rank = 1
Read documentation
https://community.modeanalytics.com/sql/tutorial/sql-window-functions/
https://www.firebirdsql.org/file/documentation/release_notes/html/en/3_0/rnfb30-dml-windowfuncs.html
Which of the three (including Gordon's one) solution would be faster depends upon specific database - the real data, the existing indexes, the selectivity of indexes.
While window functions can make the join-less query, I am not sure it would be faster on real data, as it maybe can just ignore indexes on order+revision cortege and do the full-scan instead, before rank=1 condition applied. While the first solution would most probably use indexes to get maximums without actually reading every row in the table.
The Firebird-support mailing list suggested a way to break out of the loop, to only use a single query: The trick is using both windows functions and CTE (common table expression): http://sqlfiddle.com/#!18/ce7cf/2
WITH TMP AS (
SELECT
*,
MAX(revision) OVER (
PARTITION BY n_order
) as max_REV
FROM TAB1
)
SELECT * FROM TMP
WHERE revision = max_REV
If you want the max revision number in Firebird:
select t.*
from tab1 t
where t.revision = (select max(t2.revision) from tab1 t2 where t2.order = t.order);
For performance, you want an index on tab1(order, revision). With such an index, performance should be competitive with any other approach.
I know that it's possible in other SQL flavors (T-SQL) to "select" provided data without a table. Like:
SELECT *
FROM (VALUES (1,2), (3,4)) tbl
How can I do this using Teradata?
Teradata has strange syntax for this:
select t.*
from (select * from (select 1 as a, 2 as b) x
union all
select * from (select 3 as a, 4 as b) x
) t;
I don't have access to a TD system to test, but you might be able to remove one of the nested SELECTs from the answer above:
select x.*
from (
select 1 as a, 2 as b
union all
select 3 as a, 4 as b
) x
If you need to generate some random rows, you can always do a SELECT from a system table, like sys_calendar.calendar:
SELECT 1, 2
FROM sys_calendar.calendar
SAMPLE 10;
Updated example:
SELECT TOP 1000 -- Limit to 1000 rows (you can use SAMPLE too)
ROW_NUMBER() OVER() MyNum, -- Sequential numbering
MyNum MOD 7, -- Modulo operator
RANDOM(1,1000), -- Random number between 1,1000
HASHROW(MyNum) -- Rowhash value of given column(s)
FROM sys_calendar.calendar; -- Use as table to source rows
A couple notes:
make sure you pick a system table that will always be present and have rows
if you need more rows than are available in the source table, do a UNION to get more rows
you can always easily create a one-column table and populate it to whatever number of rows you want by INSERT/SELECT into it:
CREATE DummyTable (c1 INT); -- Create table
INSERT INTO DummyTable(1); -- Seed table
INSERT INTO DummyTable SELECT * FROM DummyTable; -- Run this to duplicate rows as many times are you want
Then use this table to create whatever resultset you want, similar to the query above with sys_calendar.calendar.
I don't have a TD system to test so you might get syntax errors...but that should give you a basic idea.
I am a bit late to this thread, but recently got the same error.
I solved this by simply using
select distinct 1 as a, 2 as b from DBC.tables
union all
select distinct 3 as a, 4 as b from DBC.tables
Here, DBC.tables is a DB backend table with a few rows only. So, the query runs fast as well
How can I get records from my table where any of a list of integers is in the range defined by columnA and columnB integer values?
I know about the IN operator when comparing against a column value instead of a range defined by a pair of columns.
For example: select * from mytable where mytable.colA in (1,3,5,6); would get all records where colA is either 1,3,5 or 6.
Is there anything like that for ranges? Or should I do like:
select * from mytable where 1 between mytable.colA and mytable.colb
OR
3 between mytable.colA and mytable.colb
OR
5 between mytable.colA and mytable.colb
OR
6 between mytable.colA and mytable.colb;
Maybe this way:
select distinct mytable.*
from mytable
join (select 1 nr union all select 3 union all select 5 union all select 6) n
on n.nr between mytable.colA and mytable.colb
Update:
Just tested on MariaDB (10.0.19) and a 1M-row indexed table.. Your original query is ways faster.
A common tactic is to set up a temporary table, and use that to join on your main table.
A simple way to set one up is like so:
DECLARE #TempList table (LookFor int not null)
INSERT #TempList (LookFor) values
(1)
,(3)
,(5)
,(6)
As this is a table, you can use querying logic to populate it.
Next up, join this into your target table. For your example above:
SELECT mt.*
from myTable mt
inner join #TempList tl
on tl.LookFor = mt.ColA
And, if I'm interpreting correctly, this might be what you're really looking for:
SELECT mt.*
from myTable mt
inner join #TempList tl
on tl.LookFor between mt.ColA and mt.ColB
Let's say I have a boolean field in a database table and I want to get a tally of how many are 1 and how many are 0. Currently I am doing:
SELECT 'yes' AS result, COUNT( * ) AS num
FROM `table`
WHERE field = 1
UNION
SELECT 'no' AS result, COUNT( * ) AS num
FROM `table`
WHERE field = 0;
Is there an easier way to get the result so that even if there are no false values I will still get:
----------
|yes | 3 |
|no | 0 |
----------
One way would be to outer join onto a lookup table. So, create a lookup table that maps field values to names:
create table field_lookup (
field int,
description varchar(3)
)
and populate it
insert into field_lookup values (0, 'no')
insert into field_lookup values (1, 'yes')
now the next bit depends on your SQL vendor, the following has some Sybase (or SQL Server) specific bits (the outer join syntax and isnull to convert nulls to zero):
select description, isnull(num,0)
from (select field, count(*) num from `table` group by field) d, field_lookup fl
where d.field =* fl.field
you are on the right track, but the first answer will not be correct. Here is a solution that will give you Yes and No even if there is no "No" in the table:
SELECT 'Yes', (SELECT COUNT(*) FROM Tablename WHERE Field <> 0)
UNION ALL
SELECT 'No', (SELECT COUNT(*) FROM tablename WHERE Field = 0)
Be aware that I've checked Yes as <> 0 because some front end systems that uses SQL Server as backend server, uses -1 and 1 as yes.
Regards
Arild
This will result in two columns:
SELECT SUM(field) AS yes, COUNT(*) - SUM(field) AS no FROM table
Because there aren't any existing values for false, if you want to see a summary value for it - you need to LEFT JOIN to a table or derived table/inline view that does. Assuming there's no TYPE_CODES table to lookup the values, use:
SELECT x.desc_value AS result,
COALESCE(COUNT(t.field), 0) AS num
FROM (SELECT 1 AS value, 'yes' AS desc_value
UNION ALL
SELECT 2, 'no') x
LEFT JOIN TABLE t ON t.field = x.value
GROUP BY x.desc_value
SELECT COUNT(*) count, field FROM table GROUP BY field;
Not exactly same output format, but it's the same data you get back.
If one of them has none, you won't get that rows back, but that should be easy enough to check for in your code.