我们需要以这样一种方式实现以下查询：我们不应该编写这么大的查询 相反，我们应该通过程序，函数或匿名块（我们可以采用的方式）来实现它
wk_units1-105是列名 cnt_sls_dm.fct_sales_summary表名。 我们正在比较同一个表中的数据，但是a.fct_sales_summary的第2周 与b.fct_sales_summary的第1周
简而言之，我们需要在pl / sql中创建一些东西以应用以下功能（我是仪式）
SELECT DISTINCT A.bio_id ,
DECODE(A.wk_units2 - B.wk_units1,0,NULL,A.wk_units2) prev,
DECODE(A.wk_units2 - B.wk_units1,0,NULL,B.wk_units1) curr,
DECODE(A.wk_units3 -B.wk_units2,0,NULL,A.wk_units3) prev,
DECODE(A.wk_units3 -B.wk_units2,0,NULL,B.wk_units2) curr,
DECODE(A.wk_units4 -B.wk_units3,0,NULL,A.wk_units4) prev,
DECODE(A.wk_units4 -B.wk_units3,0,NULL,B.wk_units3) curr,
DECODE(A.wk_units5 -B.wk_units4,0,NULL,A.wk_units5) prev,
DECODE(A.wk_units5 -B.wk_units4,0,NULL,B.wk_units4) curr,
DECODE(A.wk_units6 -B.wk_units5,0,NULL,A.wk_units6) prev,
DECODE(A.wk_units6 -B.wk_units5,0,NULL,B.wk_units5) curr
. . .
. . .
. . .
DECODE(A.wk_units105 -B.wk_units104,0,NULL,A.wk_units105) prev,
DECODE(A.wk_units105 -B.wk_units105,0,NULL,B.wk_units104) curr
FROM
cnt_sls_dm.fct_sales_summary A,
cnt_sls_dm.fct_sales_summary B
WHERE
A.bio_id=B.bio_id AND A.bio_id<>0
AND ROWNUM<25
AND ( A.wk_units2<> B.wk_units1
OR A.wk_units3<> B.wk_units2
OR A.wk_units4<> B.wk_units3
OR A.wk_units5<> B.wk_units4
OR A.wk_units6<> B.wk_units5
. .
. .
. .
OR A.wk_units105<>B.wk_units104)
The output is like:
BIO_ID PREV CURR PREV_1 CURR_1 PREV_2 CURR_2 PREV_3 CURR_3
5,032,130.00 -1 0 0 1 0 1
5,032,130.00 1 0 0 1 1 0 0 1
5,032,130.00 0 1 0 1
5,032,130.00 1 0 1 1 0 0 0 1
5,032,328.00 5 3 0 36 0 2 0 0
我们实施了以下不起作用的东西
DECLARE
sql_str long(32000);
where_str long(32000);
counter NUMBER(3):=0;
BEGIN
sql_str:='SELECT '||'A.bio_id ,';
where_str:=' where '||'A.bio_id=B.bio_id AND'||' A.bio_id<>0 and rownum<25 AND (' ;
LOOP
counter:=counter+1;
sql_str:=sql_str||'decode(A.wk_units'||(counter+1)||' - B.wk_units'|| (counter)||',0,NULL,A.wk_units'||(counter+1)||')';
sql_str:=sql_str||', decode(A.wk_units'||(counter+1)||' - B.wk_units'|| (counter)||',0,NULL,B.wk_units'||(counter)||')' ;
where_str:=where_str||' A.wk_units'||(counter+1)||'<> B.wk_units'||(counter) ;
EXIT WHEN counter=50;
sql_str:=sql_str||', ';
where_str:=where_str||' or ';
END LOOP;
sql_str:=sql_str||' from cnt_sls_dm.fct_sales_summary A, cnt_sls_dm.fct_sales_summary B';
sql_str:=sql_str||where_str||')';
dbms_output.put_line(sql_str);
EXECUTE IMMEDIATE (sql_str);
END;
我们应该得到输出作为记录，但我们得到以下查询作为输出在蟾蜍运行良好，但我们希望上面的脚本将结果作为记录但不作为查询.......... ..
SELECT A.bio_id ,DECODE(A.wk_units2 - B.wk_units1,0,NULL,A.wk_units2),
DECODE(A.wk_units2 - B.wk_units1,0,NULL,B.wk_units1), DECODE(A.wk_units3 -
B.wk_units2,0,NULL,A.wk_units3), DECODE(A.wk_units3 -
B.wk_units2,0,NULL,B.wk_units2), DECODE(A.wk_units4 -
B.wk_units3,0,NULL,A.wk_units4), DECODE(A.wk_units4 -
B.wk_units3,0,NULL,B.wk_units3), DECODE(A.wk_units5 -
B.wk_units4,0,NULL,A.wk_units5), DECODE(A.wk_units5 -
B.wk_units4,0,NULL,B.wk_units4), DECODE(A.wk_units6 -
B.wk_units5,0,NULL,A.wk_units6), DECODE(A.wk_units6 -
B.wk_units5,0,NULL,B.wk_units5), DECODE(A.wk_units7 -
B.wk_units6,0,NULL,A.wk_units7), DECODE(A.wk_units7 -
B.wk_units6,0,NULL,B.wk_units6), DECODE(A.wk_units8 -
B.wk_units7,0,NULL,A.wk_units8), DECODE(A.wk_units8 -
B.wk_units7,0,NULL,B.wk_units7), DECODE(A.wk_units9 -
B.wk_units8,0,NULL,A.wk_units9), DECODE(A.wk_units9 -
B.wk_units8,0,NULL,B.wk_units8), DECODE(A.wk_units10 -
B.wk_units9,0,NULL,A.wk_units10), DECODE(A.wk_units10 -
B.wk_units9,0,NULL,B.wk_units9), DECODE(A.wk_units11 -
B.wk_units10,0,NULL,A.wk_units11), DECODE(A.wk_units11 -
B.wk_units10,0,NULL,B.wk_units10), DECODE(A.wk_units12 -
B.wk_units11,0,NULL,A.wk_units12), DECODE(A.wk_units12 -
B.wk_units11,0,NULL,B.wk_units11), DECODE(A.wk_units13 -
B.wk_units12,0,NULL,A.wk_units13), DECODE(A.wk_units13 -
B.wk_units12,0,NULL,B.wk_units12), DECODE(A.wk_units14 -
B.wk_units13,0,NULL,A.wk_units14), DECODE(A.wk_units14 -
B.wk_units13,0,NULL,B.wk_units13), DECODE(A.wk_units15 -
B.wk_units14,0,NULL,A.wk_units15), DECODE(A.wk_units15 -
B.wk_units14,0,NULL,B.wk_units14), DECODE(A.wk_units16 -
B.wk_units15,0,NULL,A.wk_units16), DECODE(A.wk_units16 -
B.wk_units15,0,NULL,B.wk_units15), DECODE(A.wk_units17 -
B.wk_units16,0,NULL,A.wk_units17), DECODE(A.wk_units17 -
B.wk_units16,0,NULL,B.wk_units16), DECODE(A.wk_units18 -
B.wk_units17,0,NULL,A.wk_units18), DECODE(A.wk_units18 -
B.wk_units17,0,NULL,B.wk_units17), DECODE(A.wk_units19 -
B.wk_units18,0,NULL,A.wk_units19), DECODE(A.wk_units19 -
B.wk_units18,0,NULL,B.wk_units18), DECODE(A.wk_units20 -
B.wk_units19,0,NULL,A.wk_units20), DECODE(A.wk_units20 -
B.wk_units19,0,NULL,B.wk_units19), DECODE(A.wk_units21 -
B.wk_units20,0,NULL,A.wk_units21), DECODE(A.wk_units21 -
B.wk_units20,0,NULL,B.wk_units20), DECODE(A.wk_units22 -
B.wk_units21,0,NULL,A.wk_units22), DECODE(A.wk_units22 -
B.wk_units21,0,NULL,B.wk_units21), DECODE(A.wk_units23 -
B.wk_units22,0,NULL,A.wk_units23), DECODE(A.wk_units23 -
B.wk_units22,0,NULL,B.wk_units22), DECODE(A.wk_units24 -
B.wk_units23,0,NULL,A.wk_units24), DECODE(A.wk_units24 -
B.wk_units23,0,NULL,B.wk_units23), DECODE(A.wk_units25 -
B.wk_units24,0,NULL,A.wk_units25), DECODE(A.wk_units25 -
B.wk_units24,0,NULL,B.wk_units24), DECODE(A.wk_units26 -
B.wk_units25,0,NULL,A.wk_units26), DECODE(A.wk_units26 -
B.wk_units25,0,NULL,B.wk_units25), DECODE(A.wk_units27 -
B.wk_units26,0,NULL,A.wk_units27), DECODE(A.wk_units27 -
B.wk_units26,0,NULL,B.wk_units26), DECODE(A.wk_units28 -
B.wk_units27,0,NULL,A.wk_units28), DECODE(A.wk_units28 -
B.wk_units27,0,NULL,B.wk_units27), DECODE(A.wk_units29 -
B.wk_units28,0,NULL,A.wk_units29), DECODE(A.wk_units29 -
B.wk_units28,0,NULL,B.wk_units28), DECODE(A.wk_units30 -
B.wk_units29,0,NULL,A.wk_units30), DECODE(A.wk_units30 -
B.wk_units29,0,NULL,B.wk_units29), DECODE(A.wk_units31 -
B.wk_units30,0,NULL,A.wk_units31), DECODE(A.wk_units31 -
B.wk_units30,0,NULL,B.wk_units30), DECODE(A.wk_units32 -
B.wk_units31,0,NULL,A.wk_units32), DECODE(A.wk_units32 -
B.wk_units31,0,NULL,B.wk_units31), DECODE(A.wk_units33 -
B.wk_units32,0,NULL,A.wk_units33), DECODE(A.wk_units33 -
B.wk_units32,0,NULL,B.wk_units32), DECODE(A.wk_units34 -
B.wk_units33,0,NULL,A.wk_units34), DECODE(A.wk_units34 -
B.wk_units33,0,NULL,B.wk_units33), DECODE(A.wk_units35 -
B.wk_units34,0,NULL,A.wk_units35), DECODE(A.wk_units35 -
B.wk_units34,0,NULL,B.wk_units34), DECODE(A.wk_units36 -
B.wk_units35,0,NULL,A.wk_units36), DECODE(A.wk_units36 -
B.wk_units35,0,NULL,B.wk_units35), DECODE(A.wk_units37 -
B.wk_units36,0,NULL,A.wk_units37), DECODE(A.wk_units37 -
B.wk_units36,0,NULL,B.wk_units36), DECODE(A.wk_units38 -
B.wk_units37,0,NULL,A.wk_units38), DECODE(A.wk_units38 -
B.wk_units37,0,NULL,B.wk_units37), DECODE(A.wk_units39 -
B.wk_units38,0,NULL,A.wk_units39), DECODE(A.wk_units39 -
B.wk_units38,0,NULL,B.wk_units38), DECODE(A.wk_units40 -
B.wk_units39,0,NULL,A.wk_units40), DECODE(A.wk_units40 -
B.wk_units39,0,NULL,B.wk_units39), DECODE(A.wk_units41 -
B.wk_units40,0,NULL,A.wk_units41), DECODE(A.wk_units41 -
B.wk_units40,0,NULL,B.wk_units40), DECODE(A.wk_units42 -
B.wk_units41,0,NULL,A.wk_units42), DECODE(A.wk_units42 -
B.wk_units41,0,NULL,B.wk_units41), DECODE(A.wk_units43 -
B.wk_units42,0,NULL,A.wk_units43), DECODE(A.wk_units43 -
B.wk_units42,0,NULL,B.wk_units42), DECODE(A.wk_units44 -
B.wk_units43,0,NULL,A.wk_units44), DECODE(A.wk_units44 -
B.wk_units43,0,NULL,B.wk_units43), DECODE(A.wk_units45 -
B.wk_units44,0,NULL,A.wk_units45), DECODE(A.wk_units45 -
B.wk_units44,0,NULL,B.wk_units44), DECODE(A.wk_units46 -
B.wk_units45,0,NULL,A.wk_units46), DECODE(A.wk_units46 -
B.wk_units45,0,NULL,B.wk_units45), DECODE(A.wk_units47 -
B.wk_units46,0,NULL,A.wk_units47), DECODE(A.wk_units47 -
B.wk_units46,0,NULL,B.wk_units46), DECODE(A.wk_units48 -
B.wk_units47,0,NULL,A.wk_units48), DECODE(A.wk_units48 -
B.wk_units47,0,NULL,B.wk_units47), DECODE(A.wk_units49 -
B.wk_units48,0,NULL,A.wk_units49), DECODE(A.wk_units49 -
B.wk_units48,0,NULL,B.wk_units48), DECODE(A.wk_units50 -
B.wk_units49,0,NULL,A.wk_units50), DECODE(A.wk_units50 -
B.wk_units49,0,NULL,B.wk_units49), DECODE(A.wk_units51 -
B.wk_units50,0,NULL,A.wk_units51), DECODE(A.wk_units51 -
B.wk_units50,0,NULL,B.wk_units50) FROM cnt_sls_dm.fct_sales_summary A,
cnt_sls_dm.fct_sales_summary B WHERE A.bio_id=B.bio_id AND A.bio_id<>0 AND
ROWNUM<25 AND ( A.wk_units2<> B.wk_units1 OR A.wk_units3<> B.wk_units2 OR
A.wk_units4<> B.wk_units3 OR A.wk_units5<> B.wk_units4 OR A.wk_units6<>
B.wk_units5 OR A.wk_units7<> B.wk_units6 OR A.wk_units8<> B.wk_units7 OR
A.wk_units9<> B.wk_units8 OR A.wk_units10<> B.wk_units9 OR A.wk_units11<>
B.wk_units10 OR A.wk_units12<> B.wk_units11 OR A.wk_units13<> B.wk_units12 OR
A.wk_units14<> B.wk_units13 OR A.wk_units15<> B.wk_units14 OR A.wk_units16<>
B.wk_units15 OR A.wk_units17<> B.wk_units16 OR A.wk_units18<> B.wk_units17 OR
A.wk_units19<> B.wk_units18 OR A.wk_units20<> B.wk_units19 OR A.wk_units21<>
B.wk_units20 OR A.wk_units22<> B.wk_units21 OR A.wk_units23<> B.wk_units22 OR
A.wk_units24<> B.wk_units23 OR A.wk_units25<> B.wk_units24 OR A.wk_units26<>
B.wk_units25 OR A.wk_units27<> B.wk_units26 OR A.wk_units28<> B.wk_units27 OR
A.wk_units29<> B.wk_units28 OR A.wk_units30<> B.wk_units29 OR A.wk_units31<>
B.wk_units30 OR A.wk_units32<> B.wk_units31 OR A.wk_units33<> B.wk_units32 OR
A.wk_units34<> B.wk_units33 OR A.wk_units35<> B.wk_units34 OR A.wk_units36<>
B.wk_units35 OR A.wk_units37<> B.wk_units36 OR A.wk_units38<> B.wk_units37 OR
A.wk_units39<> B.wk_units38 OR A.wk_units40<> B.wk_units39 OR A.wk_units41<>
B.wk_units40 OR A.wk_units42<> B.wk_units41 OR A.wk_units43<> B.wk_units42 OR
A.wk_units44<> B.wk_units43 OR A.wk_units45<> B.wk_units44 OR A.wk_units46<>
B.wk_units45 OR A.wk_units47<> B.wk_units46 OR A.wk_units48<> B.wk_units47 OR
A.wk_units49<> B.wk_units48 OR A.wk_units50<> B.wk_units49 OR A.wk_units51<>
B.wk_units50)
答案 0 :(得分：5)
使其更加紧凑，规范化表格。如果您的列名为：
wk_units1
wk_units2
wk_units3
...
wk_units48
wk_units49
wk_units50
你可以将它们标准化为行，你可以随时将它们PIVOT拉回到列位置，如果有必要进行查询。