tsql - Create Tree Query From Numeric Mapping Table in SQL -

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i have exported table accounting software below.

 accountid     accountname      ---------     -----------  11            acc11  12            acc12  13            acc13  11/11         acc11/11  11/12         acc11/12  11/111        acc11/111  11/11/001     acc11/11/001  11/11/002     acc11/11/002  12/111        acc12/111  12/112        acc12/112

then want convert tree query in ms-sql server 2008 use treelist datasource in win aaplication.

expected sql query result:

 accountid     accountname    id   parentid  level   haschild  ---------     -----------    ---  --------- ------  --------  11            acc11          1     null       1        1  12            acc12          2     null       1        1  13            acc13          3     null       1        0  11/11         acc11/11       4     1          2        1  11/12         acc11/12       5     1          2        0  11/111        acc11/111      6     1          2        0  11/11/001     acc11/11/001   7     4          3        0  11/11/002     acc11/11/002   8     4          3        0  12/111        acc12/111      9     2          2        0  12/112        acc12/112      10    2          2        0

would please me creating sql query? thanks.

no doubts,whatever query write or whatever dba do,your query slow because of faulty table structure.

i believe above query working fine other sample data also.

in such situation,i fetch record in front end (c# etc) , manipulation there in order desire output,it fast in such cases.

i have tried write query in own way,hope fast 6000 records.also please test query other sample data also.

i find lastindexof("/") join

declare @filepath varchar(50) = '11/11/001' declare @findchar1 varchar(1) = '/'  select substring (@filepath,0, len(@filepath) - charindex(@findchar1,reverse(@filepath))+1 )as lastoccuredat

final query,

declare @tbl table(id int identity(1,1), accountid  varchar(100), accountname varchar(100)); insert @tbl values   ('11','acc11') ,('12','acc12') ,('13','acc13') ,('11/11','acc11/11') ,('11/12','acc11/12') ,('11/111','acc11/111') ,('11/11/001','acc11/11/001') ,('11/11/002','acc11/11/002') ,('12/111','acc12/111') ,('12/112','acc12/112');   declare @findchar varchar(1) = '/'       select a.id         ,a.accountid         ,a.accountname         ,(             select min(c.id)             @tbl c             c.id < a.id                 , substring(a.accountid, 0, len(a.accountid) - charindex(@findchar, reverse(a.accountid)) + 1) = c.accountid             ) parentid         ,len(a.accountid) - len(replace(a.accountid, '/', '')) + 1 [level]         ,(             select case                      when min(c.id) not null                         1                     else 0                     end             @tbl c             c.id > a.id                 , substring(c.accountid, 0, len(c.accountid) - charindex(@findchar, reverse(c.accountid)) + 1) = a.accountid             ) haschild     @tbl     inner join @tbl b on a.id = b.id + 1

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