test
子宮與房
1001 回覆
2 Like
8 Dislike
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shahayah哈哈哈哈或者也也也應該是ahha
test
testtest
廢post借嚟派下膠
Don't use separator to performance storing a list to achieve one to many.
example
Don't use separator to performance storing a list to achieve one to many.
example
fk = "1,2,3,4,5"
Hard to maintains the list
Has maximum Solution: build an intersection table. (a.id, b.id) a reference a table pk, b reference b table pk
MYSQL foreign key will automatically indexed and the fk should be reference another table index.
Hard to maintains the list
Has maximum Solution: build an intersection table. (a.id, b.id) a reference a table pk, b reference b table pk
MYSQL foreign key will automatically indexed and the fk should be reference another table index.
varchar(x)
varchar(x)
Test
test
Test
