(1)当前开发使用with as语句进行数据查询,查询代码如下: 生产机查询时间大约109s。 (关于with as用法见:https://www.topunix.com/post-10515.html) with tab as (select b.scan_barcode, b.datetime_created, a.mo_code from inv_transfer_detail a inner join inv_transfer_detail_barcode b on a.id =...
as mysql中的with tab mysql as语句,数据分析无法离开SQL这一重要的工具,经过十天时间的学习,并完全以MySQL工具对上一节的数据分析岗位数据进行了分析,加强了操作训练,对这一工具使用有了基本的经验。本着以输出为手段检验学习效果,以温故而知新,把MySQL基础知识系统
因为UNION ALL的每个部分可能相同,但是如果每个部分都去执行一遍的话,则成本太高,所以可以使用WITH AS短语,则只要执行一遍即可。如果WITH AS短语所定义的表名被调用两次以上,则优化器会自动将WITH AS短语所获取的数据放入一个TEMP表里,如果只是被调用一次,则不会。而提示materialize则是强制将WITH AS短语里的数据放入...
[CDATA[ANDT3.DATA_NUM<=0]]>GROUPBYT2.ORGCODE) AGROUPBYA.ORGCODE)SELECT*FROMTMP_TABWHEREORGCODEIN(SELECTT.ORGCODEFROM(SELECTDISTINCTORGCODEFROMMETA_ORG_TABLE) T,YLT_ORG_INFO T2WHERET.ORGCODE=T2.ORGCODE(+)ANDT2.PARENTORGID=(SELECTPARENTORGIDFROMYLT_ORG_INFOWHEREORGCODE=#ORGCODE#))<is...
Now, let’s consider an arbitrary case, where there is a requirement to monitor and track Grade 3 students data. As a layman, one would think of sorting and storing student-related information in different spreadsheets in Excel. For instance, personal details in one tab, departmental details ...
JSON functions, first introduced in SQL Server 2016 (13.x), enable you to combine NoSQL and relational concepts in the same database. You can combine classic relational columns with columns that contain documents formatted as JSON text in the same table, parse and import JSON documents in rel...
Connect to the publisher in SQL Server Management Studio. Expand the server node, right-click the Replication folder, and then select Launch Replication Monitor. In Replication Monitor, select the AdvWorksProductTrans publication, and select the All Subscriptions tab. Right-click the subscription and...
In SQL Server Metadata Explorer, you can alter the table and index properties on the Table tab. To see these changes in SQL Server, make these changes before you load the schemas into SQL Server. Changes made in a metadata explorer are reflected in the project metadata, not in the source...
Enterprise Manager (SQL Server 2000) In Enterprise Manager, click to expand theSecurityfolder. Right-clickLinked Servers, and then clickNew linked server. On theGeneraltab, follow these steps: In the first text box, type any name for the linked server. ...
Go to Performance Hub, select one or more SQL IDs on the ASH Analytics tab, and click Tune SQL. Click Tune SQL in the SQL Tuning Advisor tasks section and select SQL statements or an STS. Note that to be able to select individual SQL statements as the input, the SQL statements must...