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December 1, 2021 16:31
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WCS quest // Les jointures
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mysql> SELECT lastname, firstname, role, name | |
-> FROM wizard | |
-> JOIN player ON wizard.id=player.wizard_id | |
-> JOIN team ON team.id=player.team_id | |
-> ORDER BY name ASC, role ASC, lastname ASC, firstname ASC; | |
+-----------------+-------------+--------+------------+ | |
| lastname | firstname | role | name | | |
+-----------------+-------------+--------+------------+ | |
| Black | Sirius | beater | Gryffindor | | |
| Brown | Lavender | beater | Gryffindor | | |
| Finnigan | Seamus | beater | Gryffindor | | |
| Hagrid | Rubeus | beater | Gryffindor | | |
| Longbottom | Alice | beater | Gryffindor | | |
| McGonagall | Minerva | beater | Gryffindor | | |
| Potter | Harry | beater | Gryffindor | | |
| Potter | James | beater | Gryffindor | | |
| Thomas | Dean | beater | Gryffindor | | |
| Weasley | Arthur | beater | Gryffindor | | |
| Weasley | Percy | beater | Gryffindor | | |
| Bell | Katie | chaser | Gryffindor | | |
| Dumbledore | Albus | chaser | Gryffindor | | |
| Granger | Hermione | chaser | Gryffindor | | |
| J. | Lily | chaser | Gryffindor | | |
| Jordan | Lee | chaser | Gryffindor | | |
| Longbottom | Augusta | chaser | Gryffindor | | |
| Longbottom | Frank | chaser | Gryffindor | | |
| Longbottom | Neville | chaser | Gryffindor | | |
| Pettigrew | Peter | chaser | Gryffindor | | |
| Spinnet | Alicia | chaser | Gryffindor | | |
| Weasley | George | chaser | Gryffindor | | |
| Wood | Oliver | chaser | Gryffindor | | |
| | Cadogan | keeper | Gryffindor | | |
| Creevey | Dennis | keeper | Gryffindor | | |
| de | Nicholas | keeper | Gryffindor | | |
| Dumbledore | Aberforth | keeper | Gryffindor | | |
| Johnson | Angelina | keeper | Gryffindor | | |
| Weasley | Ginevra | keeper | Gryffindor | | |
| Binns | Cuthbert | seeker | Gryffindor | | |
| Creevey | Colin | seeker | Gryffindor | | |
| Gryffindor | Godric | seeker | Gryffindor | | |
| Vane | Romilda | seeker | Gryffindor | | |
| Weasley | Fred | seeker | Gryffindor | | |
| Weasley | Ronald | seeker | Gryffindor | | |
| Weasley | William | seeker | Gryffindor | | |
| Abbott | Hannah | beater | Hufflepuff | | |
| Finch-Fletchley | Justin | beater | Hufflepuff | | |
| Friar | Fat | beater | Hufflepuff | | |
| Smith | Hepzibah | beater | Hufflepuff | | |
| Sprout | Pomona | beater | Hufflepuff | | |
| Tonks | Nymphadora | beater | Hufflepuff | | |
| Bones | Amelia | chaser | Hufflepuff | | |
| Scamander | Newton | chaser | Hufflepuff | | |
| Bones | Susan | keeper | Hufflepuff | | |
| Diggory | Cedric | keeper | Hufflepuff | | |
| Smith | Zacharias | keeper | Hufflepuff | | |
| Hufflepuff | Helga | seeker | Hufflepuff | | |
| Clearwater | Penelope | beater | Ravenclaw | | |
| Quirrell | Quirinus | beater | Ravenclaw | | |
| Ravenclaw | Helena | beater | Ravenclaw | | |
| Warren | Myrtle | beater | Ravenclaw | | |
| Chang | Cho | chaser | Ravenclaw | | |
| Edgecombe | Marietta | chaser | Ravenclaw | | |
| Flitwick | Filius | chaser | Ravenclaw | | |
| Goldstein | Anthony | chaser | Ravenclaw | | |
| Lockhart | Gilderoy | chaser | Ravenclaw | | |
| Lovegood | Luna | chaser | Ravenclaw | | |
| Lovegood | Xenophilius | chaser | Ravenclaw | | |
| Ollivander | Garrick | chaser | Ravenclaw | | |
| Corner | Michael | seeker | Ravenclaw | | |
| Ravenclaw | Rowena | seeker | Ravenclaw | | |
| Trelawney | Sybill | seeker | Ravenclaw | | |
| Bulstrode | Millicent | beater | Slytherin | | |
| Crabbe | Vincent | beater | Slytherin | | |
| Flint | Marcus | beater | Slytherin | | |
| Parkinson | Pansy | beater | Slytherin | | |
| Snape | Severus | beater | Slytherin | | |
| Zabini | Blaise | beater | Slytherin | | |
| Baron | Bloody | chaser | Slytherin | | |
| Lestrange | Bellatrix | chaser | Slytherin | | |
| Lestrange | Rodolphus | chaser | Slytherin | | |
| Malfoy | Draco | chaser | Slytherin | | |
| Malfoy | Lucius | chaser | Slytherin | | |
| Nigellus | Phineas | chaser | Slytherin | | |
| Nott | Theodore | chaser | Slytherin | | |
| Riddle | Tom | chaser | Slytherin | | |
| Tonks | Andromeda | chaser | Slytherin | | |
| Black | Regulus | keeper | Slytherin | | |
| Goyle | Gregory | seeker | Slytherin | | |
| Lestrange | Rabastan | seeker | Slytherin | | |
| Malfoy | Narcissa | seeker | Slytherin | | |
| Slytherin | Salazar | seeker | Slytherin | | |
| Umbridge | Dolores | seeker | Slytherin | | |
+-----------------+-------------+--------+------------+ | |
84 rows in set (0,01 sec) | |
mysql> SELECT firstname, lastname, role | |
-> FROM wizard | |
-> JOIN player ON wizard.id=player.wizard_id WHERE role="seeker" | |
-> ORDER BY lastname ASC, firstname ASC; | |
+-----------+------------+--------+ | |
| firstname | lastname | role | | |
+-----------+------------+--------+ | |
| Cuthbert | Binns | seeker | | |
| Michael | Corner | seeker | | |
| Colin | Creevey | seeker | | |
| Gregory | Goyle | seeker | | |
| Godric | Gryffindor | seeker | | |
| Helga | Hufflepuff | seeker | | |
| Rabastan | Lestrange | seeker | | |
| Narcissa | Malfoy | seeker | | |
| Rowena | Ravenclaw | seeker | | |
| Salazar | Slytherin | seeker | | |
| Sybill | Trelawney | seeker | | |
| Dolores | Umbridge | seeker | | |
| Romilda | Vane | seeker | | |
| Fred | Weasley | seeker | | |
| Ronald | Weasley | seeker | | |
| William | Weasley | seeker | | |
+-----------+------------+--------+ | |
16 rows in set (0,00 sec) | |
mysql> SELECT firstname, lastname, role | |
-> FROM wizard | |
-> LEFT JOIN player ON wizard.id=player.wizard_id | |
-> WHERE role is NULL; | |
+-----------+----------+------+ | |
| firstname | lastname | role | | |
+-----------+----------+------+ | |
| Terry | Boot | NULL | | |
| Crabbe | | NULL | | |
| Remus | Lupin | NULL | | |
| Padma | Patil | NULL | | |
| Parvati | Patil | NULL | | |
| Demelza | Robins | NULL | | |
| Horace | Slughorn | NULL | | |
| Charles | Weasley | NULL | | |
| Molly | Weasley | NULL | | |
+-----------+----------+------+ | |
9 rows in set (0,00 sec) |
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