How to specify decimal size in C# code? how to speed retrieving data from big table data when select from it? how to speed up execution time of a stored procedure ? How to speed up shrinking the mdf file. How to
Whether doing the uncompressed shadow table idea mentioned in the question, or @sp_BlitzErik's suggestion in a comment about restoring the DB and uncompressing there to check, it should not be assumed that the size of the uncompressed table == the size of said data in memory on the app ...
1. 大于,小于,大于或等于,小于或等于,不等于2. value是否在List中:in 和 not in3. 判断元素是否存在exists4.selectdistinct的实现:5.查询嵌入对象的值6.数组大小匹配size7. 全部匹配 本博客将列举一些常用的MongoDB操作,方便平时使用时快速查询,如find, count, 大于小于不等, select distinct, groupby等 ...
查询文档,in 操作 代码语言:javascript 代码运行次数:0 运行 AI代码解释 > db.inventory.find( { status: { $in: [ "A", "D" ] } } ) { "_id" : ObjectId("60b5e622dd6e93ee8bf35a9d"), "item" : "journal", "qty" : 25, "size" : { "h" : 14, "w" : 21, "uom" : "cm"...
1. 将下面脚本保存为 MakeSelectQueriesToLoad.sqlSELECT DISTINCT CONCAT('SELECT ',ndxcollist,' FROM ',db,'.',tb, ' ORDER BY ',ndxcollist,';') SelectQueryToLoadCache FROM ( SELECT engine,table_schema db,table_name tb, index_name,GROUP_CONCAT(column_name ORDER BY seq_in_index) ndxcol...
DirectoryName : \\aqdb1812\C$ Size(MB) : 161.166 CreationTime : 3/15/2013 2:08:25 PM LastAccessTime : 4/29/2013 2:03:31 PM LastWriteTime : 3/16/2013 1:59:26 AM Invalid ServerName in List.txt PS C:\> Get-Files -extn bak ...
NOTE: Use this connector for the following devices: Cisco Meraki, Zscaler Private Access (ZPA), VMware vCenter, Apache HTTP server, Apache Tomcat, Jboss Enterprise application platform, Juniper IDP, MarkLogic Audit, MongoDB Audit, Nginx HTTP server, Oracle Weblogic server, PostgreSQL Events, ...
| DB Size | +---+ | 1499.32MB | +---+ 1 row in set, 1 warning (0.13 sec) mysql> 5:查看数据库编码 mysql> show variables like 'character%'; +---+---+ | Variable_name | Value | +---+---+ | character_set_client | utf8 | | character_set_connection...
NOTE: Use this connector for the following devices: Cisco Meraki, Zscaler Private Access (ZPA), VMware vCenter, Apache HTTP server, Apache Tomcat, Jboss Enterprise application platform, Juniper IDP, MarkLogic Audit, MongoDB Audit, Nginx HTTP server, Oracle Weblogic server, PostgreSQL Events, ...
数据库访问工具 DBUtil DBUtil 用于简化数据库的访问,只要准备好配置文件,调用 DBUtil 的静态函数就能直接得到查询数据库的结果。 本文主要内容有: 数据库访问的思考 DBUtil 实例 DBUtil 的 API DBUtil 的实现 把 SQL 语句放到文件里 ORMapping