how to get a select count(x) from a query of table names - sql

Question

I have a query the brings back a list of tables and the counts of those tables.
select *
from error
with a result of
tablename | errorcnt
----------+---------
table1 | 5
table2 | 256
and so on.
I need to do a join so I can get another count from each table as to the records that have been corrected example
select count(fixed)
from table1
so my new result would be
tablename | errorcnt | fixed
----------+----------+------
table1 | 5 | 3
table2 | 256 | 239
and so on.
Without doing a cursor how could I do? I guess a sub query using 'tablename'.

Answer 1

The comment you made:
This is how i populate my errortable SELECT T.name TableName,i.Rows
NumberOfRows FROM sys.tables T JOIN sys.sysindexes I ON T.OBJECT_ID =
I.ID WHERE indid IN (0,1) ORDER BY i.Rows DESC,T.name
Means you are looking for tables, and their respective indexes, for tables that are either a heap (i.e. has no index) or have a clustered index. I'm not sure why this would classify as an "error". I'd expect you to want to look for only heaps. i.e. on where indid = 0. Regardless, I suppose the "fixed" would be to return tables that, for example, didn't have a clustered index which now does. In that case I don't understand the schema and think you have asked a XY Question
With that being said,based off the other comments, you could use derived tables and join on the literal values of error.tablename to prevent the use of a cursor.
select
error.tablename
,error.errorcnt
,fixed = coalesce(t1.ct, t2.ct) --add in for each join.
from
error
left join (select count(fixed) as ct from table1 where fixed = 'Y') as t1 on error.tablename = 'table1'
left join (select count(fixed) as ct from table2 where fixed = 'Y') as t2 on error.tablename = 'table2'
--continue the joins for all values in error.tablename
A cursor would be less code, and dynamic, but you asked for a way without a cursor.

Answer 2

you can use temp table and while loop avoid cursor
DECLARE
#SQLQuery NVARCHAR(100),
#Tablename VARCHAR(100)
CREATE TABLE
#error
(
tablename VARCHAR(100),
errorcnt INT
)
CREATE TABLE
#Table1
(
fixed INT
)
CREATE TABLE
#Table2
(
fixed INT
)
CREATE TABLE
#Temp_fixed
(
fixed INT
)
INSERT INTO
#error
VALUES
(
'#Table1',
5
),
(
'#Table2',
256
)
INSERT INTO
#Table1
VALUES
(
3
)
INSERT INTO
#Table2
VALUES
(
239
)
SELECT
tablename,
errorcnt,
-1 AS fixed
INTO
#Temp_error
FROM
#error
WHILE EXISTS(SELECT TOP 1 1 FROM #Temp_error WHERE fixed = -1)
BEGIN
SET
#Tablename = (SELECT TOP 1 tablename FROM #Temp_error WHERE fixed = -1)
SET
-- #SQLQuery = 'SELECT COUNT(fixed) FROM ' + #Tablename
#SQLQuery = 'SELECT SUM(fixed) FROM ' + #Tablename
INSERT INTO
#Temp_fixed
(
fixed
)
EXECUTE
sp_executesql
#SQLQuery
UPDATE
#Temp_error
SET
fixed = ISNULL((SELECT TOP 1 fixed FROM #Temp_fixed), 0)
WHERE
tablename = #Tablename
TRUNCATE TABLE #Temp_fixed
END
SELECT
tablename,
errorcnt,
fixed
FROM
#Temp_error
DROP TABLE #error
DROP TABLE #Table1
DROP TABLE #Table2
DROP TABLE #Temp_error
DROP TABLE #Temp_fixed