3表，JOIN查詢和字母順序

Question

我目前正在使用三張表，我試圖找出如何使用連接來顯示任何一本書的編號爲title_id的Dennis McCann。這些表共有title_id和editor_id。不能找到一種方式將它們拼湊在一起。如何以Dennis McCann爲編輯的任何一本書的title_id？

SELECT * FROM title_editors;

EDITOR_ID TITLE_ EDITOR_ORDER 
    ----------- ------ ------------ 
    826-11-9034 Bu2075   2 
    826-11-9034 PS2091   2 
    826-11-9034 Ps2106   2 
    826-11-9034 PS3333   2 
    826-11-9034 PS7777   2 
    826-11-9034 pS1372   2 
    885-23-9140 MC2222   2 
    885-23-9140 MC3021   2 
    885-23-9140 Tc3281   2 
    885-23-9140 TC4203   2 
    885-23-9140 TC7777   2 
    321-55-8906 bU1032   2 
    321-55-8906 BU1111   2 
    321-55-8906 BU7832   2 
    321-55-8906 PC1035   2 
    321-55-8906 PC8888   2 
    321-55-8906 BU2075   3 
    777-02-9831 pc1035   3 
    777-02-9831 PC8888   3 
    943-88-7920 BU1032   1 
    943-88-7920 bu1111   1 
    943-88-7920 BU2075   1 
    943-88-7920 BU7832   1 
    943-88-7920 PC1035   1 
    943-88-7920 pc8888   1 
    993-86-0420 PS1372   1 
    993-86-0420 PS2091   1 
    993-86-0420 PS2106   1 
    993-86-0420 PS3333   1 
    993-86-0420 pS7777   1 
    993-86-0420 MC2222   1 
    993-86-0420 MC3021   1 
    993-86-0420 Tc3218   1 
    993-86-0420 TC4203   1 
    993-86-0420 TC7777   1 

35 rows selected. 

SQL> SELECT * FROM title_authors;

AUTHOR_ID TITLE_ AUTHOR_ORDER ROYALTY_SHARE 
----------- ------ ------------ ------------- 
409-56-7008 Bu1032   1   .6 
486-29-1786 PS7777   1    1 
486-29-1786 pC9999   1    1 
712-45-1867 MC2222   1    1 
172-32-1176 Ps3333   1    1 
213-46-8915 BU1032   2   .4 
238-95-7766 PC1035   1    1 
213-46-8915 Bu2075   1    1 
998-72-3567 pS2091   1   .5 
899-46-2035 PS2091   2   .5 
998-72-3567 PS2106   1    1 
722-51-5454 mc3021   1   .75 
899-46-2035 MC3021   2   .25 
807-91-6654 tC3218   1    1 
274-80-9391 BU7832   1    1 
427-17-2319 pC8888   1   .5 
846-92-7186 PC8888   2   .5 
756-30-7391 PS1372   1   .75 
724-80-9391 PS1372   2   .25 
724-80-9391 bu1111   1   .6 
267-41-2394 bU1111   2   .4 
672-71-3249 TC7777   1   .4 
267-41-2394 TC7777   2   .3 
472-27-2349 Tc7777   3   .3 
648-92-1872 TC4203   1    1 

25 rows selected. 

SQL> SELECT * FROM編輯;

EDITOR_ID EDITOR_LNAME  EDITOR_FNAME EDITOR_POSITION PHONE  ADDRESS    CITY  ST ZIP 
----------- ----------------- ------------- --------------- ------------ -------------------- ------------ -- ------ 
321-55-8906 DeLongue   Martinella Project   415 843-2222 3000 6th St.   BERKELEY  Ca 94710 
723-48-9010 Sparks   MANfred  cOPY   303 721-3388 15 Sail    DENVER Co 80237 
777-02-9831 Samuelson   Bernard  proJect   415 843-6990 27 Yosemite   OAKLAND  Ca 94609 
777-66-9902 Almond   Alfred  copy   312 699-4177 1010 E. DeVON  CHICAGO  Il 60018 
826-11-9034 Himmel   Eleanore  pRoject   617 423-0552 97 Bleaker   BOSTON Ma 02210 
885-23-9140 Rutherford-Hayes Hannah  PROJECT   301 468-3909 32 Rockbill Pike  ROCKBILL  MD 20852 
993-86-0420 McCann   Dennis  acQuisition  301 468-3909 32 Rockbill Pike  ROCKBill  MD 20852 
943-88-7920 Kaspchek   Christof  acquisitiOn  415 549-3909 18 Severe Rd.  BERKELEY  CA 94710 
234-88-9720 Hunter   Amanda  acquisition  617 432-5586 18 Dowdy Ln.   BOSTON MA 02210 

Answer 1

您可以使用Editor_ID會給你匹配的記錄，你可以過濾出在「丹尼斯·麥肯」使用或者多個條件加入或where在桌子上Editors和Ttile_Editors嘗試join條款如，

WITHOUT WHERE

SELECT DISTINCT te.title_id,ed.EDITOR_ID,ed.EDITOR_LNAME,ed.EDITOR_FNAME 
FROM 
    title_editors te JOIN editors ed 
    ON te.EDITOR_ID = ed.EDITOR_ID 
     AND ed.EDITOR_LNAME = 'McCann' 
     AND ed.EDITOR_FNAME = 'Dennis' 
ORDER BY te.title_id 

使用WHERE

SELECT DISTINCT te.title_id,ed.EDITOR_ID,ed.EDITOR_LNAME,ed.EDITOR_FNAME 
FROM 
    title_editors te JOIN editors ed 
    ON te.EDITOR_ID = ed.EDITOR_ID 
WHERE 
     ed.EDITOR_LNAME = 'McCann' 
     AND ed.EDITOR_FNAME = 'Dennis' 
ORDER BY te.title_id 

Answer 2

這將是與in操作簡單：

SELECT DISTINCT title_id 
FROM  title_editors 
WHERE editor_id IN (SELECT editor_id 
         FROM editors 
         WHERE editor_fname = 'Dennis' AND 
           editor_lname = 'McCann') 
ORDER BY title_id ASC