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DataParameter[] parms = new DataParameter[] {
new DataParameter("@uid", SqlDbType.NVarChar,uid),
new DataParameter("@pwd", SqlDbType.NVarChar,pwd)
};
string sql = "select count(*) from tb_admin where uid=@uid and pwd=@pwd ";
DataParameter[] parms = new DataParameter[] {
new DataParameter(N"@uid", SqlDbType.NVarChar,uid),
new DataParameter(N"@pwd", SqlDbType.NVarChar,pwd)
};
string sql = "select count(*) from tb_admin where uid=@uid and pwd=@pwd ";
declare @t nvarchar(20)
set @t=N'aaaa'
select @t