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IN Clause
Description

Identifies tables in any external database to which the Microsoft Jet database engine can connect, such as a dBASE or Paradox database or an external Microsoft Jet database.

Syntax

To identify a destination table:

[SELECT | INSERT] INTO destination IN
{path | ["path" "type"] | ["" [type; DATABASE = path]]}

To identify a source table:

FROM tableexpression IN
{path | ["path" "type"] | ["" [type; DATABASE = path]]}

A SELECT statement containing an IN clause has these parts:

Part
Description




destination
The name of the external table into which data is inserted.

tableexpression
The name of the table or tables from which data is retrieved. This argument can be a single table name, a saved query, or a compound resulting from an INNER JOIN, LEFT JOIN, or RIGHT JOIN.

path
The full path for the directory or file containing table.

type
The name of the database type used to create table if a database isn't a Microsoft Jet database (for example, dBASE III, dBASE IV, Paradox 3.x, or Paradox 4.x).



Remarks You can use IN to connect to only one external database at a time.

In some cases, the path argument refers to the directory containing the database files. For example, when working with dBASE, FoxPro, or Paradox database tables, the path argument specifies the directory containing .dbf or .db files. The table file name is derived from the destination or tableexpression argument.

To specify a non-Microsoft Jet database, append a semicolon (;) to the name, and enclose it in single (' ') or double (" ") quotation marks. For example, either 'dBASE IV;' or "dBASE IV;" is acceptable.

You can also use the DATABASE reserved word to specify the external database. For example, the following lines specify the same table:

... FROM Table IN "" [dBASE IV; DATABASE=C:\DBASE\DATA\SALES;];
... FROM Table IN "C:\DBASE\DATA\SALES" "dBASE IV;"
Notes

For improved performance and ease of use, use a linked table instead of IN.
You can also use the IN reserved word as a comparison operator in an expression. For more information, see the In operator.
See Also

Connect property ("DAO Language Reference"), FROM clause, INNER JOIN operation, INSERT INTO statement, LEFT JOIN, RIGHT JOIN operations, SELECT statement, SELECT...INTO statement.

Example

The following table shows how you can use the IN clause to retrieve data from an external database. In each example, assume the hypothetical Customers table is stored in an external database.

External database
SQL statement



Microsoft Jet database

SELECT CustomerID
FROM Customers
IN OtherDB.mdb
WHERE CustomerID Like "A*";


dBASE III or IV.
To retrieve data from a dBASE III table, substitute "dBASE III;" for "dBASE IV;".
SELECT CustomerID
FROM Customer
IN "C:\DBASE\DATA\SALES" "dBASE IV;"
WHERE CustomerID Like "A*";


dBASE III or IV using Database syntax.

SELECT CustomerID
FROM Customer
IN "" [dBASE IV; Database=C:\DBASE\DATA\SALES;]
WHERE CustomerID Like "A*";


Paradox 3.x or 4.x.
To retrieve data from a Paradox version 3.x table, substitute "Paradox 3.x;" for "Paradox 4.x;".
SELECT CustomerID
FROM Customer
IN "C:\PARADOX\DATA\SALES" "Paradox 4.x;"
WHERE CustomerID Like "A*";


Paradox 3.x or 4.x using Database syntax.
SELECT CustomerID
FROM Customer
IN "" [Paradox 4.x;Database=C:\PARADOX\DATA\SALES;]
WHERE CustomerID Like "A*";





(continued)

A Microsoft Excel worksheet
SELECT CustomerID, CompanyName
FROM [Customers$]
IN "c:\documents\xldata.xls" "EXCEL 5.0;"
WHERE CustomerID Like "A*"
ORDER BY CustomerID;


A named range in a worksheet
SELECT CustomerID, CompanyName
FROM CustomersRange
IN "c:\documents\xldata.xls" "EXCEL 5.0;"
WHERE CustomerID Like "A*"
ORDER BY CustomerID;




Example (Microsoft Access)

The following table shows how you can use the IN clause to retrieve data from an external database. Each example assumes the Customers table is stored in an external database.

Note The SQL IN clause is different than the SQL In operator, which is used to determine whether the value of an expression is equal to any of several values in a specified list.

External database
SQL statement



Microsoft Jet database.

JetData.mdb is the name of the Jet database that contains the Customers table.

SELECT CustomerID
FROM Customers
IN 'C:\My Documents\JetData.mdb'
WHERE CustomerID Like 'A*';

Microsoft Excel workbook (.xls file).

XLData.xls is a Microsoft Excel workbook that contains a worksheet called Customers. CustomersRange is a named range in that worksheet. Note that to denote the entire worksheet as the table, you must append a dollar sign ($) and enclose the name in brackets.

SELECT CustomerID, CompanyName
FROM [Customers$]
IN 'C:\My Documents\XLData.xls' 'EXCEL 5.0;'
WHERE CustomerID Like 'A*';

– or –

SELECT CustomerID, CompanyName
FROM CustomersRange
IN 'C:\My Documents\XLData.xls' 'EXCEL 5.0;'
WHERE CustomerID Like 'A*';

dBASE III or IV.

To retrieve data from a dBASE III table, substitute dBASE III for dBASE IV.

SELECT CustomerID
FROM Customers
IN C:\DBASE\DATA\SALES dBASE IV;
WHERE CustomerID Like A*;




(continued)

External database
SQL statement



dBASE III or IV (by using DATABASE syntax).

To retrieve data from a dBASE III table, substitute dBASE III for dBASE IV.

SELECT CustomerID
FROM Customers
IN [dBASE IV;DATABASE=C:\DBASE\DATA\SALES;]
WHERE CustomerID Like A*;

Paradox 3.x or 4.x.

To retrieve data from a Paradox version 3.x table, substitute Paradox 3.x for Paradox 4.x.

SELECT CustomerID
FROM Customers
IN C:\PARADOX\DATA\SALES Paradox 4.x;
WHERE CustomerID Like A*;

Paradox 3.x or 4.x (by using DATABASE syntax).

To retrieve data from a Paradox version 3.x table, substitute Paradox 3.x for Paradox 4.x.
SELECT CustomerID
FROM Customers
IN [Paradox 4.x;DATABASE=C:\PARADOX\DATA\SALES;]
WHERE CustomerID Like A*;

Который из них *.dbf (dBASE что ли?:))
А как ты догадался? :)