Database

Suaysh Andhare3-Oct-07 0:03

Suaysh Andhare

3-Oct-07 0:03

Create a masetr table as for ur codes and for each typeof user make a row in that table and associate a code for that.
Take another table as access roles and define a role correcponding to a particular role.
ex there are three roles (table master role)
1) admin say code 1
2) superuser say code 2
3) Normaluser say code 3

table 2 access role
uniqueID code
1)gm0013 1
2)sr1235 2
3)us0001 3
3)us0002 3
3)us0003 3
3)us0004 3

now each time take a join with table 2 based on uniqueID(key for ur table)
u'll get code and as per this code u'll give access rights to that logon person.

each time when u want to check user access role scan the user

Regards,
Suyash

PIEBALDconsult3-Oct-07 4:48

PIEBALDconsult

3-Oct-07 4:48

Make one table hold the common aspects of users; ID, name, address, etc.
Make seperate tables for the non-common aspects, linked by ID.

Create Views that mimic your current schema.

Rohde3-Oct-07 7:37

Rohde

3-Oct-07 7:37

So clear - so succinct that I wonder why I didn't think of it myself.

Thanks...

"When you have made evil the means of survival, do not expect men to remain good. Do not expect them to stay moral and lose their lives for the purpose of becoming the fodder of the immoral. Do not expect them to produce, when production is punished and looting rewarded. Do not ask, `Who is destroying the world?' You are."

-Atlas Shrugged, Ayn Rand

Concatenating Sql queries

DQNOK4-Oct-07 4:46

DQNOK

4-Oct-07 4:46

RIGHT! Now give the guy a 5-vote. Voting helps identify the really valuable posters.

Using ADO in VC++

Jackson862-Oct-07 19:49

Jackson86

2-Oct-07 19:49

Hello

I have a problem with using ADO in Visual C++. I'm need to get tables names of database by using types from ADO type library. I found one method:

_RecordsetPtr rs_table_names = ado_conn->Execute(L"SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES", NULL, -1L);

But there is a problem. This method allows me to get tables names only of SQL server, but with other database formats (MS Access, TXT files, Excel) it doesn’t work.

Thanks in advance.

Re: Using ADO in VC++

Ilya Verbitskiy3-Oct-07 5:23

Ilya Verbitskiy

3-Oct-07 5:23

It looks like that Jet provider doesn't provide access to INFORMATION_SCHEMA. I found discussion about such problems. May be it'll help you.

Re: Using ADO in VC++

Jackson863-Oct-07 19:32

Jackson86

3-Oct-07 19:32

2Ilya: Thank you for link (Спасибо за ссылочку!).
I nave another question: how can I get field data format string.
When I used DAO, I got this string by DAOProperty::GetValue call.
For example, this string looks like "General Number","General Date","Long Date" or something like "#,##0.00."p.";=#,##0.00"p."".

falles012-Oct-07 14:55

2-Oct-07 14:55

Hi,

I have a long SQL querie and my TL has asked that I concatenate them so I am not repeating the same querie over and over again. The thing is, each querie is inside a new for loop so if I concatenate, it is not picking up the previous query. For example this is what I had before for each for loop except that the end where clause is different for each.

<br />
for bla bla<br />
{<br />
ring sql = "select e.Firstname,e.Lastname,r.Role,r.Description,d.DivisionName,a.Applications,m.ManagerFirstname,m.ManagerLastname,t.ProgLanguagesDatabase" +<br />
                        " from employees e,Division d,Manager m,TechnicalSkills t,Role r,Applications a where " +<br />
                        " e.ManagerID = m.ManagerID<br />

My TL wants me to write
for {
sql1 = blabla
}

for bla
{
sql2 = sql1 + (Sql query)
}

Obviously it is telling me that sql2 does not exist. At the moment I have something like this after the queries.

SqlDataAdapter myCommand = new SqlDataAdapter(sql, myConnection);

and obviously I can't overload this each time with sql2, sql3 etc)???

Sianny aka Sharny

Christian Graus2-Oct-07 15:37

Christian Graus

2-Oct-07 15:37

Realistically, you should not be building SQL this way anyhow, you should be calling stored procs, from a data layer.

I'm not sure I follow, you will have multiple queries in one call ? then your string needs to be defined outside the first loop, so you can add to it.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

falles012-Oct-07 15:42

2-Oct-07 15:42

if I declare them outside the loops
string sql1;
string sql2;
string sql3;
etc
then inside each for loop I have a sql query like
for ()
{
sql2 = sql1 + "where bla bla";
}

for()
{
sql3 = sql1 +"where bla bla";
}

Obviously sql1 and 2 and 3 etc are never assigned as they are defined outside the loops and it never picks up their value?

This is what the error is telling me anyway.
Thanks

falles012-Oct-07 15:53

2-Oct-07 15:53

ah...i think I worked it out now. I'm not sure if that is what you were trying to tell me anyway, but I have declared the common query outside all the loops like this

string sql = "Select e.Firstname,e.Lastname,r.Role,r.Description,d.DivisionName,a.Applications,m.ManagerFirstname,m.ManagerLastname,t.ProgLanguagesDatabase" +
" from employees e,Role r,Division d, Manager m, TechnicalSkills t,Applications";

then later i have used sql2 = sql + "where etc";

Is this the correct way?

thanks

Sharny

Christian Graus2-Oct-07 16:46

Christian Graus

2-Oct-07 16:46

I expect each loop would end up adding a query to the main sql string, but, it's hard to say, I'm not entirely sure why you're putting strings in from more than one loop, or what the end product is to be. But yes, having one string to hold all the SQl was my suggestion.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

falles013-Oct-07 13:57