Invalid column name in SQL query

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I'm a bit rusty in writing SQL Queries, I'm trying to output a list of 'Contacts' with no 'PAs'

select a.first_name, a.last_name, (select count(b.contact_id)) as "PA Count" 
from CRM_Contact a left join CRM_PA b on a.id = b.contact_id 
where [PA Count] = 0 
group by a.first_name, a.last_name

Could someone explain why I am getting the error message:

Invalid column name 'PA Count'.

WHERE can only use columns or their aliases. PA Count though is an aggregate that gets calculated after WHERE.

Filtering aggregates is performed with the HAVING clause :

SELECT a.first_name, 
       a.last_name, 
       COUNT(b.contact_id) as [PA Count]
FROM CRM_Contact a 
       LEFT JOIN CRM_PA b ON a.id = b.contact_id 
GROUP BY a.first_name, 
          a.last_name 
HAVING Count(b.contact_id) =0

SQL Server reports 'Invalid column name', but the column is present , I suspect that you have two tables with the same name. One is owned by the schema 'dbo' ( dbo.PerfDiag ), and the other is owned by the� Microsoft distributes Microsoft SQL Server 2008 and Microsoft SQL Server 2008 R2 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 or SQL Server 2008 R2 fix release.

If you would like to COUNT then just use column name without SELECT statement and use HAVING statement after GROUP BY:

select 
  a.first_name
, a.last_name
, Count(b.contact_id) as "PA Count" 
from CRM_Contact a 
left join CRM_PA b on a.id = b.contact_id 
group by a.first_name, a.last_name
HAVING Count(b.contact_id) = 0

What does 'invalid column name' mean in SQL?, It means that the column name violates the condition(s) of a column name. For example, it may have a special character in the column name or it may use a reserved keyword (e.g INTEGER) as a column name,that renders it invalid. DataSource.Error: Microsoft SQL: Invalid column name 'MyCol'. Details: DataSourceKind=SQL DataSourcePath=MySqlServer 2 - Delete the query and create a new query

You forgot to use From in the following query:

(select count(b.contact_id) from YourTable)

Why is this query throwing an "Invalid Column Name" error , By default SQL Server treats double quotes as a delimiter for identifiers (for instance column names), and that is what happens for your query. Your dynamic query uses ' characters as the string delimiter, so the last line ends up reading like this after the string is built: WHERE u.UserName IN (cat) According to this, cat reads like a column name. To fix it, you need to include escaped ' characters in either the definition of `SET @MemberNames = '''cat'''`

SQL Server, In this blog, we will look into steps to be followed for fixing invalid column name ' ABC' Error while accessing a newly-added column. You may think the column is in the demographics table, but it is not. The most likely reason (in this case) is a spelling mistake. If I had to guess, there are additional spaces in the name, before or after 'Gender'. One way to find the actual name of the column is to look in information_schema.columns:

MSSQL - Fix Error - Invalid column name, Error Msg 207, Level 16, State 1, Line 8 Invalid column name 'frank'. Msg 207, Level Duration: 0:22 Posted: Dec 14, 2017 Msg 207, Level 16, State 1 Invalid column name 'splunge'. */ IF 1 = 0 BEGIN SELECT 1 FROM dbo.blats AS b INNER JOIN dbo.splunges AS s ON b.blat = s.splunge; END GO /* "success" */ Now create a table called dbo.blats but without a column named blat: CREATE TABLE dbo.blats(id int);

How to fix the 'invalid column name' error?, However, ACL returned "Invalid column name" error message. Also the SQL Query is not ACL code, it needs to be SQL code, and for that the� Invalid column name exception in SQL Query - VB.Net. Ask Question Asked 6 years ago. Active 6 years ago. Viewed 4k times 0. I made a button to receive the texts from

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