Multiple Inner Join SQL Access

Multiple INNER JOIN SQL ACCESS

Access requires parentheses in the FROM clause for queries which include more than one join. Try it this way ...

FROM
    ((tbl_employee
    INNER JOIN tbl_netpay
    ON tbl_employee.emp_id = tbl_netpay.emp_id)
    INNER JOIN tbl_gross
    ON tbl_employee.emp_id = tbl_gross.emp_ID)
    INNER JOIN tbl_tax
    ON tbl_employee.emp_id = tbl_tax.emp_ID;

If possible, use the Access query designer to set up your joins. The designer will add parentheses as required to keep the db engine happy.

SQL Access: Multiple Inner Join between Two Tables

You can try this method (this is using subqueries, beware it may be somewhat slow if the table is big):

SELECT Production.[Production Reference ID],
(SELECT Reagents.Supplier FROM Reagents WHERE Reagents.[Reagent Reference ID] = Production.[C Reference ID] ) as CSupplier, 
(SELECT Reagents.Supplier FROM Reagents WHERE Reagents.[Reagent Reference ID] = Production.[P Reference ID] ) as PSupplier
FROM Production;

Edit: With some Testing, I found out how it works in JOIN too, and it's a lot faster then method 1:

SELECT C.Supplier as 'C Supplier', P.Supplier as 'P Supplier'
FROM ( Production
INNER JOIN Reagents AS C ON C.[Reagent Reference Number]=Production.[C Reference Number] )
INNER JOIN Reagents AS P ON P.[Reagent Reagent Reference Number]=Production.[P Reference Number]
WHERE Production.[Production Reference Number]=?

MS Access requires parentheses when using more then one JOIN in a query.

SQL syntax error Multiple inner join

In MS Access, you need to use parentheses for multiple joins:

SELECT *
FROM (tproducts INNER JOIN
      torder
      ON tproducts.Product_ID = torder.Product_ID
     ) INNER JOIN
     tcustomer
     ON torder.Customer_ID = tcustomer.Customer_ID;

No other database requires this, and using parentheses like this looks awkward for any other database.

Access-SQL: Inner Join with multiple tables

If you are writing a query against an Access database backend, you need to use the following join syntax:

select
  t1.c1
, t2.c2
, t3.c3
, t4.c4
from ((t1
inner join t2 on t1.something = t2.something)
inner join t3 on t2.something = t3.something)
inner join t4 on t3.something = t4.something

The table and column names aren't important here, but the placement of the parentheses is. Basically, you need to have n - 2 left parentheses after the from clause and one right parenthesis before the start of each new join clause except for the first, where n is the number of tables being joined together.

The reason is that Access's join syntax supports joining only two tables at a time, so if you need to join more than two you need to enclose the extra ones in parentheses.

Using Aliases with two Joins on MS-Access Query

Access syntax is different than other dbms when it comes to joins (among other things).
Requires parentheses:

SELECT t.[Assy ID], t1.[Abbreviation], t.[From ICA], t2.[Abbreviation], t.[To ICA], t.[To Loc], t.[Date], t.Comments
FROM (tbl_AssyMoves As t INNER JOIN tbl_ICAs As t1 ON t1.[ICA #]=t.[From ICA])
INNER JOIN t1 As t2 ON t2.[ICA #]=t.[To ICA]
WHERE ((t.Date Between [Forms]![Form1]![StartDate] And [Forms]![Form1]![EndDate])

MS Access Inner Join On 3 Tables with the same field_name

With Access you need to use parentheses when doing more than one join:

SELECT  * 
FROM    (Table1 
        INNER JOIN Table2 
            ON Table1.Master_Number = Table2.Master_Number)
        INNER JOIN Table4 
            ON Table1.Master_Number = Table4.Master_Number;

This is essentiall spliting down you query so you have at most one join per section, i.e. Your First query is:

SELECT  *
FROM    Table1
        INNER JOIN Table2
            ON Table1.Master_Number = Table2.Master_Number;

Then you have:

SELECT  *
FROM    YourFirstQuery
        INNER JOIN Table4 
            ON Table1.Master_Number = Table4.Master_Number;

This differs slightly from subqueries as you are still able to reference all fields from Table1 and Table2.

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EDIT

To avoid duplicating columns you will need to explicitly list the columns you want (although you should be doing this anyway):

SELECT  Table1.Master_Number,
        Table1.Asset_Tag,
        Table1.Serial_Number,
        Table2.Last_Name,
        Table2.First_Name,
        Table4.Office_Number,
        Table4.Location,
        Table4.Department
FROM    (Table1 
        INNER JOIN Table2 
            ON Table1.Master_Number = Table2.Master_Number)
        INNER JOIN Table4 
            ON Table1.Master_Number = Table4.Master_Number;

Access nested joins with multiple where's possible?

When you are using LEFT OUTER JOIN and you want to filter some records from Right table then you need to move the right table filter to ON condition else LEFT OUTER JOIN will be implicitly converted to INNER JOIN

To make it short, WHERE clause you reject rows with NULL which are produced by LEFT OUTER JOIN for non matching records

SELECT customerlist.*, 
       sales.sales, 
       sales.monthyear 
FROM   (customerlist 
        INNER JOIN whobuyswhat 
                ON customerlist.customerid = whobuyswhat.customerid) 
       LEFT JOIN sales 
              ON (customerlist.customerid = sales.customerid 
                 AND sales.monthyear = #1/1/2015#) 
WHERE WhoBuysWhat.ProductID=2
ORDER  BY customerlist.customername; 

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