Personal Oracle Database 10g Release 10.2.0.3.0
CREATE temp TABLE t1(a INTEGER, b INTEGER);
INSERT INTO t1 VALUES(1,2);
INSERT INTO t1 VALUES(9,8);
SELECT a AS b, b AS a FROM t1 ORDER BY a;
B A
---------------------- ----------------------
1 2
9 8
2 rows selected
SELECT b AS a, a AS b FROM t1 ORDER BY a;
A B
---------------------- ----------------------
2 1
8 9
2 rows selected
SELECT a, b AS a FROM t1 ORDER BY a;
SQL Error: ORA-00960: ambiguous column naming in select list
00960. 00000 - "ambiguous column naming in select list"
*Cause: A column name in the order-by list matches more than one select
list columns.
SELECT a AS x, b AS x ORDER BY x;
SQL Error: ORA-00923: FROM keyword not found where expected
00923. 00000 - "FROM keyword not found where expected"
SELECT a AS b, b AS a WHERE a=1;
SQL Error: ORA-00923: FROM keyword not found where expected
00923. 00000 - "FROM keyword not found where expected"
SELECT a AS b, b AS a WHERE a=2;
SQL Error: ORA-00923: FROM keyword not found where expected
00923. 00000 - "FROM keyword not found where expected"
SELECT a AS x, b AS x WHERE x=1;
SQL Error: ORA-00923: FROM keyword not found where expected
00923. 00000 - "FROM keyword not found where expected"
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