What's the difference??? and WHY

Question

The below select query returns a row ....
SELECT
vdd.disp_desc vcInsStatusDesc,
'W' vcCustomerType,
NULL vcInsOwnerFullname,
cpd.cpd_no vcValidationPostCode,
cpd.cpd_options_selection vcOptionsSelection,
cpd.cpd_complexity vcComplexity,
cpd.cpd_fl_main_line vcFlMainline,
DECODE(wip.wip_wil_id,NULL,'N','Y') vcFlag,
wol.wol_order_ref vcWolCwOrderRef,
wol.wol_order_status vcOrderStatus,
wol.wol_order_status vcOrderStatusDesc
wol.wol_prod_type_code vcProdTypeCode,
wol.wol_proc_type_code vcProcTypeCode
FROM
wol_order_lines wol,
wol_ins_products wip,
v_db_domains vdd,
cpd_details cpd,
*{color:#ff0000}(*
SELECT
*'A4829E6' ins_id,*
*'028' ins_std_code,*
*'66344000' ins_tel*
FROM
DUAL
*) ip{color}*
WHERE
wol.wol_std_code(+) = ip.ins_std_code
AND wol.wol_ins_tel(+) = ip.ins_tel
AND wip.wip_ins_id(+) = ip.ins_id
AND vdd.column_name = 'INS_STATUS'
AND vdd.domain_value = 'S'
AND cpd.cpd_ins_id(+) = ip.ins_id;
But the following one doesnt return any row.....
SELECT
vdd.disp_desc vcInsStatusDesc,
'W' vcCustomerType,
NULL vcInsOwnerFullname,
cpd.cpd_no vcValidationPostCode,
cpd.cpd_options_selection vcOptionsSelection,
cpd.cpd_complexity vcComplexity,
cpd.cpd_fl_main_line vcFlMainline,
DECODE(wip.wip_wil_id,NULL,'N','Y') vcFlag,
wol.wol_order_ref vcWolCwOrderRef,
wol.wol_order_status vcOrderStatus,
wol.wol_order_status vcOrderStatusDesc
wol.wol_prod_type_code vcProdTypeCode,
wol.wol_proc_type_code vcProcTypeCode
FROM
wol_order_lines wol,
wol_ins_products wip,
v_db_domains vdd,
cpd_details cpd
WHERE
wol.wol_std_code(+) = '028'
AND wol.wol_ins_tel(+) = '66344000'
AND wip.wip_ins_id(+) = 'A4829E6'
AND vdd.column_name = 'INS_STATUS'
AND vdd.domain_value = 'S'
AND cpd.cpd_ins_id(+) = 'A4829E6';
(I have removed the select statement from the "FROM" and have supplied the values directly here)
Can anyone tell me what's the difference???
Edited by: user580340 on Sep 12, 2008 11:50 AM

Answer 1

SQL> SELECT
2 vdd.disp_desc vcInsStatusDesc,
3 'W' vcCustomerType,
4 NULL vcInsOwnerFullname,
5 DECODE(wip.wip_wil_id,NULL,'N','Y') vcWlrFlag
6 FROM
7 wlr_order_lines_pos wol,
8 wlr_ins_products wip,
9 v_db_domains vdd,
10 cps_details cpd,
11 (
12 SELECT
13 'A4829E6' ins_id,
14 '028' ins_std_code,
15 '66344000' ins_tel
16 FROM
17 DUAL
18 ) ip
19 WHERE
20 wol.wol_std_code(+) = ip.ins_std_code
21 AND wol.wol_ins_tel(+) = ip.ins_tel
22 AND wip.wip_ins_id(+) = ip.ins_id
23 AND vdd.column_name = 'INS_STATUS'
24 AND vdd.domain_value = 'S'
25 AND cpd.cpd_ins_id(+) = ip.ins_id;
VCINSSTATU V V V
In service W N
SQL> SELECT
2 vdd.disp_desc vcInsStatusDesc,
3 'W' vcCustomerType,
4 NULL vcInsOwnerFullname,
5 DECODE(wip.wip_wil_id,NULL,'N','Y') vcWlrFlag
6 FROM
7 wlr_order_lines_pos wol,
8 wlr_ins_products wip,
9 v_db_domains vdd,
10 cps_details cpd
11 WHERE
12 wol.wol_std_code(+) = '028'
13 AND wol.wol_ins_tel(+) = '66344000'
14 AND wip.wip_ins_id(+) = 'A4829E6'
15 AND vdd.column_name = 'INS_STATUS'
16 AND vdd.domain_value = 'S'
17 AND cpd.cpd_ins_id(+) = '2439714';
no rows selected
SQL>