摘要： 1、加索引，只能針對百萬左右數(shù)據(jù)量 2、分表，每個月的數(shù)據(jù)歸檔到一個新表按月保存，查詢時使用union連查 閱讀全文

摘要： SELECT * FROM (SELECT tt.*, ROWNUM AS rowno FROM ( SELECT t.vin_mt ,dbxx FROM {PdaCommonAppService.PREFIX}v_pj_dygx t WHERE vin_jj like '%{input.vin_j 閱讀全文

摘要： select rand(CHECKSUM(NEWID())) 閱讀全文

摘要： windows平臺訪問遠程服務器共享目錄下的access數(shù)據(jù)庫文件 public class SharedDirectoryManager { // logon types private const int Logon32_Logon_Interactive = 2; private const 閱讀全文

摘要： SELECT TableName = CASE WHEN A.colorder = 1 THEN D.name ELSE '' END, PrimaryKey = CASE WHEN EXISTS ( SELECT 1 FROM sysobjects WHERE xtype = 'PK' AND p 閱讀全文

摘要： SELECT TableName = CASE WHEN A.colorder = 1 THEN D.name ELSE '' END, PrimaryKey = CASE WHEN EXISTS ( SELECT 1 FROM sysobjects WHERE xtype = 'PK' AND p 閱讀全文

摘要： 單主鍵 with T as( SELECT ROW_NUMBER() over (PARTITION By 工件號 order by 檢測時間 desc) as rowid,* FROM 檢測表 ) delete from T where id not in( select id from T wh 閱讀全文

摘要： select msd.*,sc.* FROM MachinesShiftDetails as msd OUTER APPLY (select top 1 * from ShiftCalendars where MachineShiftDetailId = msd.Id) as sc 閱讀全文

摘要： with TS as( SELECT ROW_NUMBER() over (PARTITION By code order by code) as rowid,* FROM StateInfos ) select [Hexcode] ,[DisplayName] ,[Code] ,[Original 閱讀全文

摘要： 查詢存在某個屬性的記錄 db.getCollection('Machine').find({LineCapacityCount:{ $exists: true }}) 刪除Machine文檔中 Parameter對象的STD::STATUS屬性， {} 表示所有 {"multi":true} 表示多 閱讀全文