mssql_connect 不会连接同一个 SQL Server 上的不同数据库

Question

$conn_161 = "192.168.0.161";  //local serwer adress
$user_161 = "ME";
$pass_161 = "what_is_the_password?";
$connect_161 = mssql_connect($conn_161,$user_161,$pass_161);
mssql_select_db ( 'DUKENUKEN3D' , $connect_161 );

//as requested - 1st DB connection and 1st query
$q_duke = "select * from DUKE /*DB1*/";
$r_duke = mssql_query($q_wartownik,$connect_161); //result

$connect_different_db = mssql_connect($conn_161,$user_161,$pass_161);
mssql_select_db ( 'BIGMAN' , $connect_different_db );

//second db and query
$q_bigman = "select * from BIGPEOPLE /*DB2*/";
$r_bigman = mssql_query($q_bigman,$connect_different_db ); //result

Error:

Warning: mssql_query() [function.mssql-query]: message: Invalid object name 'DUKE'.

Yes I know mssql_select_db is old, but I need to use it in this project. As you see I try to connect to same server but select 2 different DB at the same time, and run queries in the same php page (to connect data from 2 different DB). It seems it is not valiable? I even tried to run mssql_select_db just before doing the query to second DB, and then changing it back to first DB.

I understand this is limitation of the library (I will run all queries from LAST selected DB).

Is there a workaroud? Because all I got is to create page inside invisible iframe and there run php page with different db connection - far from good solution.

Answer 1

I would expect that this will work the same as it would if you were running this in a SQL environment directly (eg you can try it in SSMS or from the command line).

You can specify the database name when you reference the table in the query: eg

select * from db1.dbo.DUKE 

This is standard SQL Server behaviour whenever you want to refer to an object which is outside the context of the current database.