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## COALESCE?Create comma delimited list field from table field

 Author Message vwilliams SSC Veteran Group: General Forum Members Points: 247 Visits: 62 I have two tables, TableA, TableB. I need to update a field in TableB - b.newfield to contain the list of distinct values that TableA contains for the possible combinations of two other fields. For this example, the value in field 1 will be consistent. Is this possible with COALESCE?Example:TableA field1 field2 field3 1 2 352 1 2 536 1 2 555 1 2 555 1 3 111 1 3 777 1 4 222 1 4 222So TableB should look like Field1 Field2 Newfield 1 2 '555, 342, 536' 1 3 '111, 777' 1 4 '222' winash SSCertifiable Group: General Forum Members Points: 6412 Visits: 1883 Is this what you are looking for? You might want to tweak the code if it doesn't perform well for large amounts of data...--setup dataDECLARE @Tab1 TABLE(field1 int, field2 int)INSERT @Tab1(field1,field2)SELECT 2,352UNION ALLSELECT 2,536UNION ALLSELECT 2,555UNION ALLSELECT 2,555UNION ALLSELECT 3,111UNION ALLSELECT 3,777UNION ALLSELECT 4,222UNION ALLSELECT 4,222DECLARE @Tab2 TABLE(field1 int, field2 varchar(1000))INSERT @Tab2(field1)SELECT 1UNION ALLSELECT 2UNION ALLSELECT 3UNION ALLSELECT 4UNION ALLSELECT 5-- check dataSELECT * FROM @Tab1SELECT * FROM @Tab2-- check querySELECT field1, STUFF(( SELECT ',' + CAST(T.field2 as varchar(30)) FROM @Tab1 T WHERE T.field1 = T1.field1 GROUP BY T.field1,T.field2 ORDER BY T.field2 FOR XML PATH('')),1,1,'') AS ConcatStuffFROM @Tab1 T1GROUP BY field1UPDATE @Tab2 SET field2 = T.ConcatStuff FROM@Tab2 T2 INNER JOIN ( SELECT field1, STUFF(( SELECT ',' + CAST(T.field2 as varchar(30)) FROM @Tab1 T WHERE T.field1 = T1.field1 GROUP BY T.field1,T.field2 ORDER BY T.field2 FOR XML PATH('') ),1,1,'') AS ConcatStuff FROM @Tab1 T1 GROUP BY field1)T ONT2.field1 = T.field1-- check update worksSELECT * FROM @Tab2Just to know - why exactly do you want to get this comma delimited values? I prefer not to do too much of string manipulations in T-SQL and leave that to the front end (if possible)... vwilliams SSC Veteran Group: General Forum Members Points: 247 Visits: 62 Thanks for replying. I actually found a simpler answer:SELECT t.field1,t.field2,LEFT(sl.numlist,LEN(sl.numlist)-1) as newfieldFROM(SELECT DISTINCT field2,field1 FROM tableA) tCROSS APPLY(SELECT distinct CAST(field3 AS varchar(10)) + ',' AS [text()]FROM tableBWHERE field2= t.field2FOR XML PATH(''))sl(numlist)I created a temp table using this, and then joined it to my original table to update the field. Madhivanan-208264 SSCarpal Tunnel Group: General Forum Members Points: 4161 Visits: 476 http://www.simple-talk.com/sql/t-sql-programming/concatenating-row-values-in-transact-sql/ MadhivananFailing to plan is Planning to fail

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