How to optimize SQL in daily work?

Random recommended

• What do you think of Peng YuYan's question
• How to use the if statement to output the following results
• one hundred and eleven trillion and one hundred and eleven billion one hundred and eleven million one hundred and eleven thousand one hundred and eleven
• Then I ask for the sum difference quotient product of 3 and 2. What should I do
• There is an unhandled exception at 0x008672b2 (ucrtbased. DLL) (in 20211009. Exe): 0xc0000005: an access conflict occurred while writing to location 0xcccc.
• Mysql database needs to be migrated, and all primary key types UUID should be changed to bigint. How to deal with the foreign keys of the sub table?
• In the quick sort code, remove if (left & gt; right) return 0; After, why does the code not work properly?
• Find the sum of N rational numbers (the result is expressed by shaping / shaping)
• How to change the color of the label text of the sector chart in E-chart
• Why choose C for this question and what knowledge points
• C calls WebKit kernel. How to display Chinese about input?
• one trillion and one hundred and eleven billion one hundred and eleven million one hundred and eleven thousand one hundred and eleven
• How does the VMware Workstation open interface look like Figure 2
• How to write this one, everyone (JS algorithm problem)
• MySQL finds the duplicate data of a single field or multiple fields and clears the duplicate data
• Summary and sharing of Android construction speed optimization, two sides of meituan Android R & D post
• Vue project Internationalization -- El table view is not updated
• Mybatis caching mechanism (first level cache, second level cache, interview experience of Java spring recruitment in 2021
• An exception eolesyserror in module word clock occurred during the installation of world clock exe at 0005248D. No class is registered What should I do?
• Basic usage of mybatis, Linux interrupt handler architecture
• Wrote a parquet file with Bloom filter. Now you can use bloom filter when you want to read files with spark. Does spark have the corresponding implementation?
• There are four round towers with centers of (2,2), (- 2.2), (- 2, - 2), (2, - 2) and circle radius of 1, as shown in Figure 4.17. The height of the four towers is 10m, and there are no buildings outside the towers. Now enter the coordinates of any point t
• The source of DTS is self built MySQL or RDS. What is the migration scheme for MySQL?
• The source of DTS is RDS. What is the migration scheme of MariaDB?
• The source of DTS is RDS. What is the migration scheme of PPAs?
• What are the tasks in MapReduce?
• How to synchronize zoocfg configuration files in zookeeper?
• What is the migration scheme for polardb mysql, the source of DTS?
• What is the migration scheme for polardb o engine as the source of DTS?
• What is the migration scheme with polardb-x 2.0 as the source of DTS?
• What is dataX?
• What is the workflow of MapReduce?
• The source of DTS is polardb. What is the migration scheme of PostgreSQL?
• What system management functions does the metadata mechanism in the data warehouse mainly support?
• Where is the docker configuration file? How to modify the configuration?
• What is the execution process of MapReduce application?
• What is the difference between left semi join and left join in data warehouse?
• What is the design architecture of dataX?
• The source of DTS is self built SQL server or RDS. What is the migration scheme of SQL Server?
• The source of DTS is self built mongodb or cloud database. What is the migration scheme for the new console of mongodb?