SAS reading bit data type in sql server 2005

Question

I have a sql server 2005 database that has a table with a column of data type bit. When I look at the data in sql server management studio I see the column value as 0 or 1, when i pull with SAS I see 0 or -1, is like SAS is negating the 1 value. Anyone have an explanation for this? Thanks.

Answer 1

I reckon you must be using libname oledb to connect to SQL Server from SAS. I'm able to replicate your problem here:-

SQL Server code to generate dummy data

create table dbo.tbl (
    tblId           int identity(1,1)   not null
                    constraint pk_tbl_tblId primary key,

    bool        bit not null,
)
go

insert into dbo.tbl(bool) values(0)
insert into dbo.tbl(bool) values(1)

SAS code using OLEDB

libname imm oledb provider=sqloledb
        properties=(
            "Integrated Security"=SSPI
            "Persist Security Info"=False
            "Initial Catalog"=test
            "Data Source"=localhost
        );

proc print data=imm.tbl; run;

The print out is:-

Obs          tblId    bool

1              1      0
2              2     -1

SAS code using PROC SQL

It seems like using PROC SQL should fix your problem.

proc sql noprint;
    connect to sqlservr (
        server='localhost' 
        database='test' 
        'Integrated Security'='SSPI' 
        'Persist Security Info'='False'
    );

    create table test as
    select *
    from connection to sqlservr (
        select * from dbo.tbl
    );

    disconnect from sqlservr;
quit;

proc print data=test; run;

The print out is:-

Obs          tblId    bool

1              1      0
2              2      1