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的数据，适合⼀维查询 ⼆叉树：每个节点⾄多有两个分⽀：左⼦树与右⼦树 KD-Tree：⽀持K-维度的数据（例如平⾯中的点、空间中的点等）的存储与查询的⼆ 叉树，每⼀层更换分叉判定的维度 B-Tree：适合顺序访问，利于硬盘存储数据 R-Tree：存储空间⼏何结构 …… 8 数据结构：⼆叉树 ⼆叉树要么是⼀棵空树，要么是⼀个节点；它最多具有两个⼦树：左⼦树与右⼦树 叶节点的两个⼦树都是空树

storage engines that support nonspatial indexing of spatial columns, the engine creates a B-tree index. A B-tree index on spatial values will be useful for exact-value lookups, but not for range scans. Documentation, Release 3.2.21.dev Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex functional indexes. BTreeIndex class BTreeIndex(*expressions, fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the

storage engines that support nonspatial indexing of spatial columns, the engine creates a B-tree index. A B-tree index on spatial values will be useful for exact-value lookups, but not for range scans. django.contrib.postgres.fields module. Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex Documentation, Release 3.1.15.dev BTreeIndex class BTreeIndex(fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the

storage engines that support nonspatial indexing of spatial columns, the engine creates a B-tree index. A B-tree index on spatial values will be useful for exact-value lookups, but not for range scans. django.contrib.postgres.fields module. Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex functional indexes. BTreeIndex class BTreeIndex(*expressions, fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the

storage engines that support nonspatial indexing of spatial columns, the engine creates a B-tree index. A B-tree index on spatial values will be useful for exact-value lookups, but not for range scans. django.contrib.postgres.fields module. Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex autosummarize parameter was added. BTreeIndex class BTreeIndex(fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the

django.contrib.postgres.fields module. Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex functional indexes. BTreeIndex class BTreeIndex(*expressions, fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the JSONField in the database, see Querying JSONField. Indexing Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying JSONField. On PostgreSQL only, you can use

storage engines that support nonspatial indexing of spatial columns, the engine creates a B-tree index. A B-tree index on spatial values will be useful for exact-value lookups, but not for range scans. django.contrib.postgres.fields module. Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex autosummarize parameter was added. BTreeIndex class BTreeIndex(fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the

storage engines that support nonspatial indexing of spatial columns, the engine creates a B-tree index. A B-tree index on spatial values will be useful for exact-value lookups, but not for range scans. django.contrib.postgres.fields module. Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex argument takes a positive integer. BTreeIndex class BTreeIndex(fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the

storage engines that support nonspatial indexing of spatial columns, the engine creates a B-tree index. A B-tree index on spatial values will be useful for exact-value lookups, but not for range scans. django.contrib.postgres.fields module. Indexing these fields Index and Field.db_index both create a B-tree index, which isn’t particularly helpful when querying complex data types. Indexes such as GinIndex autosummarize parameter was added. BTreeIndex class BTreeIndex(fillfactor=None, **options) Creates a B-Tree index. Provide an integer value from 10 to 100 to the fillfactor parameter to tune how packed the