我只知道索引很有帮助,而且查询速度更快.
下面两个有什么不同?
1.
class Meta:
indexes = [
models.Index(fields=['last_name', 'first_name',]),
models.Index(fields=['-date_of_birth',]),
]
2.个
class Meta:
indexes = [
models.Index(fields=['first_name',]),
models.Index(fields=['last_name',]),
models.Index(fields=['-date_of_birth',]),
]