SQL UNION Not Working - sql

Question

I'm using SQL Server 2014 and have two table: ApplicationProjectLO and V_SIP_ALLSTAFF:
Table ApplicationProjectLO:
|---------------------|---------------------------|
| StaffEmailId | Type |
|---------------------|---------------------------|
| chinkim1 | L |
|---------------------|---------------------------|
| kandiah1 | A |
|---------------------|---------------------------|
Table V_SIP_ALLSTAFF
|---------------------|----------------|-------------------|---------------|
| lOGINID | displayname | Email Address |MainOfficeTelNo|
|---------------------|----------------|---------------- |-------------- |
| chinkim1 | james | 1 | 5 |
|---------------------|----------------|---------------- |---------------|
| kandiah1 | hoho | 2 | 8 |
|---------------------|----------------|---------------- |---------------|
I would like to display the information based on 'Type'.
So if the StaffEmailId match the LONGINID and the type is A, the information of type A (that is hoho, 2, and 8) must be displayed, and if type is L then it james, 1, and 5 must be displayed.
I tried to use UNION and UNION ALL to run two select statement in one query but it only return type=L result based on this query:
SELECT
vsa.displayname NameofLiaisonOfficer,
vsa.EmailAddress LOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as LOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap
INNER JOIN V_SIP_ALLSTAFF vsa ON ap.StaffEmailId = vsa.LOGINID
WHERE ap.Type = 'L'
UNION ALL
SELECT
vsa.displayname NameofAlternateLiaisonOfficer,
vsa.EmailAddress AlternateLOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as AlternateLOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap
INNER JOIN V_SIP_ALLSTAFF vsa ON ap.StaffEmailId = vsa.LOGINID
WHERE ap.Type = 'A'
MVC View:
<tr>
<td colspan="3">
<strong>Name of Liaison Officer</strong>
<br />
<br /> #Html.DisplayFor(m => m.TPInformationDetails.NameofLiaisonOfficer)
</td>
#*
<td>
<strong>Room Number</strong>
<br />
<br />
</td>*#
<td>
<strong>Contact Number</strong>
<br />
<br /> #Html.DisplayFor(m => m.TPInformationDetails.LOContactNo)
</td>
<td>
<strong>Email Address</strong>
<br />
<br /> #Html.DisplayFor(m => m.TPInformationDetails.LOEmail)
</td>
</tr>
<!-- Table Row -->
<tr class="even">
<td colspan="3">
<strong>Name of Alternate Liaison Officer</strong>
<br />
<br /> #Html.DisplayFor(m => m.TPInformationDetails.NameofAlternateLiaisonOfficer)
</td>
<td>
<strong>Contact Number</strong>
<br />
<br /> #Html.DisplayFor(m => m.TPInformationDetails.AlternateLOContactNo)
</td>
<td>
<strong>Email Address</strong>
<br />
<br /> #Html.DisplayFor(m => m.TPInformationDetails.AlternateLOEmail)
</td>
</tr>
<!-- Table Row -->

Answer 1

Just dispense wth the WHERE:
SELECT vsa.displayname as NameofLiaisonOfficer,
vsa.EmailAddress LOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as LOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap INNER JOIN
V_SIP_ALLSTAFF vsa
ON ap.StaffEmailId = vsa.LOGINID;
Or use a WHERE that includes both types:
SELECT vsa.displayname as NameofLiaisonOfficer,
vsa.EmailAddress LOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as LOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap INNER JOIN
V_SIP_ALLSTAFF vsa
ON ap.StaffEmailId = vsa.LOGINID;
WHERE ap.Type IN ('A', 'L');
That said, it is unclear why your query -- although over-complicated -- is not returning both types. One possibility is that you are using a national character set and the "A" is not really an "A".

Answer 2

Use the below query to display the result with type 'L' and 'A'.
SELECT
vsa.displayname NameofLiaisonOfficer,
vsa.EmailAddress LOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as LOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap
INNER JOIN V_SIP_ALLSTAFF vsa ON ap.StaffEmailId = vsa.LOGINID
WHERE ap.Type IN ('L','A')
ORDER BY ap.Type desc

Answer 3

SELECT
vsa.displayname NameofLiaisonOfficer,
vsa.EmailAddress LOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as LOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap
INNER JOIN V_SIP_ALLSTAFF vsa ON ap.StaffEmailId = vsa.LOGINID
WHERE ap.Type IN ('A', 'L')

Answer 4

You need a JOIN, not an UNION. JOIN combines columns from two tables based on common key field(s).
SELECT a.field1, b.field1, b.field2 FROM table1 a JOIN table2 b ON a.keyfield=b.keyfield;

Answer 5

const string _sqlODetails = #"SELECT vsa.displayname NameofLiaisonOfficer,
vsa.EmailAddress LOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as LOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap
INNER JOIN V_SIP_ALLSTAFF vsa ON ap.StaffEmailId = vsa.LOGINID
WHERE ap.Type = 'L'";
using (var connection = Db.SqlServer())
{
tpOdetails = connection
.Query<TPInformationDetails>(_sqlODetails)
.FirstOrDefault();
}
const string _sqlADetails = #"SELECT vsa.displayname NameofAlternateLiaisonOfficer,
vsa.EmailAddress AlternateLOEmail,
'(65)' +' '+ convert(varchar, vsa.MainOfficeTelNo ) as AlternateLOContactNo,
vsa.MainOfficeTelNo GeneralOfficeConatctNo
FROM ApplicationProjectLo ap
INNER JOIN V_SIP_ALLSTAFF vsa ON ap.StaffEmailId = vsa.LOGINID
WHERE ap.Type = 'A'";
using (var connection = Db.SqlServer())
{
tpAdetails = connection
.Query<TPInformationDetails>(_sqlADetails)
.FirstOrDefault();
}