The case:
我有一個表(300行)不動產與這些細節的索引:與此數據更新表時域包含第二表的
id | locality| postcode| declat | declong | alias |
---------------------------------------------------------------------
13 | | | | | bla bla wimar bla |
14 | | | | | bla bla bla bla |
15 | | | | | bla bla bla arafo |
和其他郵政編碼表(900行):
locality| postcode | lat | long
---------------------------------------------
cande | 504 | 37.9418594 | -0.7795244
arafo | 501 | 38.9418594 | -0.7795255
wimar | 500 | 39.9418594 | -0.7795277
我需要更新這樣的表不動產行:
id | locality| postcode| declat | declong | alias |
---------------------------------------------------------------------------
13 | wimar | 500 | 39.9418594 |-0.7795277 | bla bla wimar bla |
14 | | | | | bla bla bla bla |
15 | arafo | 501 | 38.9418594 |-0.7795255 | bla bla bla arafo |
謝謝。
這兩張表之間的約束是什麼? – DonCallisto