SQL Server Konvertera heltal till binär sträng

Egentligen är detta RIKTIGT ENKELT med vanlig gammal SQL. Använd bara bitvis AND. Jag blev lite förvånad över att det inte fanns en enkel lösning på nätet (som inte innebar UDF). I mitt fall ville jag verkligen kontrollera om bitar var på eller av (data kommer från dotnet eNums).

Följaktligen är här ett exempel som ger dig separat och tillsammans - bitvärden och binär sträng (den stora föreningen är bara ett hackigt sätt att producera siffror som fungerar över DB:er:

    select t.Number
    , cast(t.Number & 64 as bit) as bit7
    , cast(t.Number & 32 as bit) as bit6
    , cast(t.Number & 16 as bit) as bit5
    , cast(t.Number & 8 as bit) as bit4
    , cast(t.Number & 4 as bit) as bit3
    , cast(t.Number & 2 as bit)  as bit2
    ,cast(t.Number & 1 as bit) as bit1

    , cast(cast(t.Number & 64 as bit) as CHAR(1)) 
    +cast( cast(t.Number & 32 as bit) as CHAR(1))
    +cast( cast(t.Number & 16 as bit)  as CHAR(1))
    +cast( cast(t.Number & 8 as bit)  as CHAR(1))
    +cast( cast(t.Number & 4 as bit)  as CHAR(1))
    +cast( cast(t.Number & 2 as bit)   as CHAR(1))
    +cast(cast(t.Number & 1 as bit)  as CHAR(1)) as binary_string
    --to explicitly answer the question, on MSSQL without using REGEXP (which would make it simple)
    ,SUBSTRING(cast(cast(t.Number & 64 as bit) as CHAR(1)) 
                    +cast( cast(t.Number & 32 as bit) as CHAR(1))
                    +cast( cast(t.Number & 16 as bit)  as CHAR(1))
                    +cast( cast(t.Number & 8 as bit)  as CHAR(1))
                    +cast( cast(t.Number & 4 as bit)  as CHAR(1))
                    +cast( cast(t.Number & 2 as bit)   as CHAR(1))
                    +cast(cast(t.Number & 1 as bit)  as CHAR(1))
                    ,
                    PATINDEX('%1%', cast(cast(t.Number & 64 as bit) as CHAR(1)) 
                                        +cast( cast(t.Number & 32 as bit) as CHAR(1))
                                        +cast( cast(t.Number & 16 as bit)  as CHAR(1))
                                        +cast( cast(t.Number & 8 as bit)  as CHAR(1))
                                        +cast( cast(t.Number & 4 as bit)  as CHAR(1))
                                        +cast( cast(t.Number & 2 as bit)   as CHAR(1))
                                        +cast(cast(t.Number & 1 as bit)  as CHAR(1)  )
                    )
,99)


from (select 1 as Number union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 
    union all select 7 union all select 8 union all select 9 union all select 10) as t

Ger detta resultat:

num  bit7 bit6 bit5 bit4 bit3 bit2 bit1 binary_string   binary_string_trimmed 
1    0    0    0    0    0    0    1    0000001         1
2    0    0    0    0    0    1    0    0000010         10
3    0    0    0    0    0    1    1    0000011         11
4    0    0    0    1    0    0    0    0000100         100
5    0    0    0    0    1    0    1    0000101         101
6    0    0    0    0    1    1    0    0000110         110
7    0    0    0    0    1    1    1    0000111         111
8    0    0    0    1    0    0    0    0001000         1000
9    0    0    0    1    0    0    1    0001001         1001
10   0    0    0    1    0    1    0    0001010         1010