Concatenating Multiple Rows Fields Into One Column In T-SQL

Jan 19 at 19:07

I am writing an SQL query in which that I will need to perform a sub select on a table, which will usually return multiple rows. I need to be able to join together the results of a certain field from all the rows into one field to output. Is this possible, and how?

For example, if the SQL query returns

id | field
1 | test1
2 | test2
3 | test3

I need the outputted field to be "test1 test2 test3".

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DataSource Controls :: Concatenating Rows From Another Two Tables

Apr 13, 2010 11:44 AM

I have a problem where I would like to get a comma-separated list of items from a couple of tables as part of a set of results. All the searching I've done so far has produced results for dealing with one or two tables. I have four, and can't get my head around how to adapt the sql to deal with it.

I have the following layout:

*Table_Castings*
+---- CastingID {PK}
| MouldID

| SerialNo

| CastRef

| MeltCode

| Signature

|

|

| *Table_CastCertificates* *Table_Certificates*

| CertificateID {PK} ----------- CertificateID {PK}

+---- CastingID {PK} Description

FileID -----------------+

|

|

*Table_CertificateFiles* |

FileID {PK} -------------+

FullLocation

The results I would like include the following columns:

CastingID, MouldID, SerialNo, CastRef, MeltCode, [Certificates],

Where Certificates is a comma separated list of Description + " " + FullLocation records. (What I'll actually do is add http:// and other html codes to make FullLocation a hyperlink, but I can do that.)

Some SQL I've already got is this:

DECLARE @str VARCHAR(500)

SELECT @str = COALESCE(@str + ', ','') + '<a href="http://' + Table_CertificateFiles.FullLocation + '">' + Table_Certificates.Description + '</a>'

FROM Table_CastCertificates INNER JOIN

Table_Certificates ON Table_CastCertificates.CertificateID = Table_Certificates.CertificateID INNER JOIN

Table_CertificateFiles ON Table_CastCertificates.FileID = Table_CertificateFiles.FileID

WHERE (CastingID = 45)

SELECT output = @str

This actually gives all records in the for the specific casting, but I keep getting an error at the "=" in @str = COALESCE when I try joining it to another query to get each casting.

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for example

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row 2 activityTotal = 3
row 3 activityTotal = 1
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How can I incorporate this into the code?

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[Code]....

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<tr>
<td>
<form method="post" action="/orders/do1"><input type=button ... /></form>
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[Code]....

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cmd.ExecuteNonQuery()
cmd.Dispose().

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Dim cmd As New SqlCommand(query, cnSql)
Dim coll As New Collection
coll.Clear()
Dim dr As SqlDataReader = cmd.ExecuteReader()
I replace some fields with the string "YES".
Dim toRepl As String = ""
If dr.HasRows Then
Do While dr.Read
toRepl = dr(5).ToString
If Len(toRepl) <= 3 Then ToRepl = "YES"
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collPrel.Add(dr(1).ToString)
.................. ..............
collPrel.Add(toRepl)
collCount = collCount + 1
Loop
End If
dr.Close()
cmd.Dispose()
Now, I insert all into a SQL Table2:
Dim a As String = "", b As String = "", c As String = "" etc.
For i = 1 To collPrel.Count Step 6
a = collPrel.Item(i).ToString
b = collPrel.Item(i + 1).ToString
.............. ...............
f = collPrel.Item(i + 5).ToString
queryIns = "INSERT INTO Tab (name, adress, etc)
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Dim cmdIns As New SqlCommand(queryIns, cnSql)
cmdIns.CommandTimeout = 600
cmdIns.ExecuteNonQuery()
cmdIns.Dispose()
Next

This way to work goes right but it is necessary a lot of time for completing the operation.

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(pt-br)
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Grade 11: TextBox3
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Method to get it as list : List<MyClass
> lstPriceBook = new
List<MyClass>(); lstPriceBook.Add(new
MyClass());TODO: Need to sort here ( by FamilyName, GroupName, SubGroupName ) after getting as a list : My

Class : Here is my class and method to call it, can you tell me how
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> lstPriceBook = new
List<MyClass>();lstPriceBook.Add(new
MyClass());TODO: Need to sort here ( by FamilyName, GroupName, SubGroupName ) after getting as a list : My
Class :public
class MyClass
{
#region Private Fields
private int?
_PriceListID;
private string
_FamilyName;
private string
_GroupName;
private string
_SubGroupName;
private int
_ItemDefaultQty;
#endregion
//Private Fields
public MyClass()
{
_PriceListID = -1;
}
#region Public Properties
public string FamilyName
{
get { return _FamilyName; }
set { _FamilyName =
value; }
}
public string GroupName
{
get { return _GroupName; }
set { _GroupName =
value; }
}
public string SubGroupName
{
get { return _SubGroupName; }
set { _SubGroupName =
value; }
}
public int ItemDefaultQty
{
get { return _ItemDefaultQty; }
set { _ItemDefaultQty =
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}
#endregion
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Example below:

This does NOT work:

[Code]....

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NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL
NULL

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NULL
NULL

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for (int i = 0; i < 1000; i++)
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}
}
public void TestMethod6()
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for (int i = 0; i < 1000; i++)
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StringBuilder sb = new StringBuilder();
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
sb.Append("dddddddd");
string t = string.Empty;
t = sb.ToString();
}
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here is my code:

[Code]....

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I did this way on Grid Views RowDataBound Event

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
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{
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[Code]....

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[code]...

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