Sorry for the SQL Server post, working on SQL Server for the first time, and
this list is my only resource as of now. I'm reading the SQL Server join
syntax and trying it myself. Meanwhile, If i can get some expert help, it
will be more than useful
I'm simplifying the problem with the help of these test tables.
CREATE TABLE t1(A VARCHAR(10), A1 VARCHAR(10), A2 VARCHAR(10));
CREATE TABLE t2(B VARCHAR(10), B1 VARCHAR(10));
CREATE TABLE t3(C VARCHAR(10), C1 VARCHAR(10));
CREATE TABLE t4(D VARCHAR(10), D1 VARCHAR(10));
INSERT INTO t1 VALUES ('A', 'AA', 'AAAA');
INSERT INTO t1 VALUES (null, 'AAAA', 'AAAA');
INSERT INTO t2 VALUES ('A', 'BB');
INSERT INTO t3 VALUES ('A', 'CC');
INSERT INTO t4 VALUES ('A', 'DD');
Table t1 refers to t2(through a) and t4(through a2) directly and t2 refers to
t3(through b).
I want to join t1 to t2, t3, t4 and retrieve all the rows inside t1
irrespective of whether the value is there in the other tables or
not(outer-join of course)
I wrote this query in Oracle and it works
SQL> SELECT a1, b1, c1, d1
2 FROM t1, t2, t3, t4
3 WHERE t1.a = t2.b(+)
4 AND t2.b = t3.c(+)
5 AND t1.a2 = t4.d
6 /
A1 B1 C1 D1
---------- ---------- ---------- ----------
AA BB CC DD
AAAA DD
I substituted the "+" with the "*" to use it in SQL Server which made my
query look like this:
SELECT a1, b1, c1, d1
FROM t1, t2, t3, t4
WHERE t1.a =* t2.b
AND t2.b =* t3.c
AND t1.a2 = t4.d
But it fails with the error:
"The table 't1' is an inner member of an outer-join clause. This is not
allowed if the table also participates in a regular join clause."
How to overcome this? Or is the query wrong?
Regards
Naveen
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