couchbase delete index

Or: Mysql> alter table 'Article' add index ('id', 'order _ id'); ADD id INDEX and order_id INDEX to the article TABLE 1. Re-indexing command Mysql> repair table tbl_name QUICK; 2. query data table IndexesMysql> show index from tbl_name; 3. Create an INDEX (primary key,

,unique) support to create primary key index, federated Index and normal index command Mysql>alter TABLE tbl_name ADD INDEX index_name (column list);Mysql>alter TABLE tbl_name ADD UNIQUE index_name (column list);Mysql>alter TABLE tbl_name ADD PRIMARY KEY index_name (column list); 4.

:totalindexsize ()> db.users.totalIndexSize()81920Example of the use of 4:getindexspecs ()> db.users.getIndexSpecs()[ { "v" : 1, "key" : { "_id" : 1 }, "name" : "_id_", "ns" : "test1.users" }, { "v" : 1, "key" : { "name" : 1 }, "name" : "name_1", "ns" : "test1.users" }, { "v" : 1, "key" : { "name" : -1 }, "name" : "name_-1", "ns" : "test1.users"

specifying "Unique:true" in the Ensureindex command. For example, insert 2 records into the table T4: Db.t4.ensureIndex ({firstname:1, lastname:1}, {unique:true}); 5. Forcing the use of indexes The hint command can force an index to be used. Db.t5.find ({age:{$lt:}). Hint ({name:1, age:1}). Explain () 6. Delete Index

, this guarantees that a single column does not contain duplicate values. For multi-column uniqueness indexes, the combination of multiple values is guaranteed to be distinct.The PRIMARY key index is very similar to a unique index. In fact, the PRIMARY key index is only a unique index with the name PRIMARY. This means

Suppose there is an array of s = [1,2,3,4,5,6,7,8,9](1) How to get the index according to the value, if the value is 5, then the corresponding index is?(2) How to delete the value according to the index, delete the corresponding value of

Label:blogardivlogsp oncnewad -----------------------------------------------------------ALTER TABLE CREATE index-----------------------------------------------------------Create primary key alter TABLE ' table_name ' ADD CONSTRAINT PRIMARY KEY (' column '); --Create PRIMARY key alter TABLE ' table_name ' ADD PRIMARY key (' column '); --Create a unique index alter TABLE ' table_name ' ADD unique index_name

by'"'; load Data infile'/usr/local/huanghai/prefix16'IGNORE into table Dsideal_db.t_resource_info_huanghai-terminated by','Enclosed by'"'; load Data infile'/usr/local/huanghai/prefix17'IGNORE into table Dsideal_db.t_resource_info_huanghai-terminated by','Enclosed by'"'; load Data infile'/usr/local/huanghai/prefix18'IGNORE into table Dsideal_db.t_resource_info_huanghai-terminated by','Enclosed by'"'; load Data infile'/usr/local/huanghai/prefix19'IGNORE into table Dsideal_db.t_resource_info_huang

Http://itbilu.com/database/mongo/E1tWQz4_e.html Indexing is the most effective means to improve query query efficiency. An index is a special kind of data structure, indexes store part of the data in an easy to traverse form (such as a specific field or set of field values), the index sorts the stored values by certain rules, and the index is stored in memory wh

Ok, I wrote the SOLR content again, yesterday made a change and increment of the incremental index, today say about the deletion of the incremental index and the scheduled update of the incremental index, nonsense said, the following into the text.One, the deletion of incremental indexAs I said yesterday, the incremental inde