Programmer Group

Stored procedure A set of SQL statements used to complete specific database functions, which are compiled and stored in the database system. In use, the user calls and executes the stored procedure by specifying the defined stored procedure name and giving the corresponding stored procedure parameters, thus completing one or a series of databas ...

The main test is what happens to expdp when a table has DML action. This test mainly opens three windows, one is to insert data, about 100W pieces will be inserted for a long time. The second window queries the inserted data, of course, it does not query 100W pieces. In the third window, when inserting data, perform data pump e ...

1. Spring Boot project adds MyBatis dependencies and Oracle drivers: <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>com.oracle</groupId> <a ...

cp command backup is a warm, full backup, the backup process needs to maintain a global read lock, this lock is more lethal to the database, it is likely to make the database hang in production environment, so it is not recommended to use in production environment. 1. Backup 1. Add a global read lock to the backup library: fl ...

linux redhat6 Oracle11g rac +lvm +asm installation process summary experience Installation environment Main operating system: windows 10 Virtual machine VMware 15: Two Red Hat Enterprise linux 6.10 Package: Oracle Database software: Oracle11gR2 Cluster software: Oracle grid infrastructure 11gR2(11.2. ...

stay MySQL How to get a list of all foreign key constraints to a specific table? Specific columns? This and The Oracle problem Same, but for MySQL. #1 building Post old answers to add some useful information. I have a similar problem, but I also want to look at constraint'u type and referred t ...

Step 1: Check the JDK View the JDK version and type: java-version on the command line [root@test ~]# java -version bash: java: command not found As above, prove that your linux is very clean, go directly to Step 2 Or the following [root@test ~]# java -version openjdk version "1.8.0_102" OpenJDK Runtime Environment (build 1.8.0_102-b14) OpenJD ...

1. If you need to find the records with "three" and "cat" in U ﹣ name, please use and condition Select * from [user] where u name like '% 3%' and u name like '% cat%' If you use select * from [user] where u name like '% 3% cat% Although we can search for "tripods", we can't search for "Zhang ...

Why would I choose mysql?Because my server configuration is low and the SqlServer instance in the docker, the running memory of the server should be kept at 2G+, I don't have this condition, it will pop out the error sqlservr: This program requires a machine with at least 2000 megabytes of memory. Listen to my friend that even if your machine i ...

1. Error code /domain/xxxx.java for block at line 44. Keep only the first 100 references. WARN: Too many duplication references on file src/main/java/com/easy3w/ebs/pb/be /domain/xxxx.java for block at line 47. Keep only the first 100 references. WARN: Too many duplication references on file src/main/java/com/easy3w/ebs/pb/be /domain/PBBE0 ...