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3.3,SqlSessionFactory SqlSessionFactory has multiple methods to create SqlSession instances, including the following two: SqlSessionFactory.openSession: a transaction will be started by default, but the transaction will not be submitted automatically, which means that the transaction needs to be submitted manually before the update operati ...

Welcome to the MySQL technical articles shared by the great SQL community. If you have any questions or want to learn, you can leave a message in the comment area below. After seeing it, you will answer itPercona XtraBackup feature descriptionPercona Xtrabackup backup recovery permission restrictionsCreate backup users, configuration parameters ...

Troubleshoot SQL with SAP HANA Database Explorer The debugger can be used to help find problems in procedures, functions, or anonymous blocks. The following steps demonstrate how to use the debugger to debug the process. Select a stored procedure, right-click it, and select Open for debugging: From the debugger attach Options dialog box, e ...

} else { /** * The following code shows that only one of the three attributes of url resource class can be selected, otherwise an error will be reported */ throw new BuilderException("A mapper element may only specify a url, resource or class, but ...

1. IntroductionSqlClient is an SQL command line interaction tool provided by Flink. When downloading the blink binary package, there is a SQL client in its bin directory SH, you can enter the interactive page by starting the script. The specific source code implementation of SqlClient can be found under the Flink SQL client sub module of the Fl ...

1, Simple search 1. Fuzzy condition query For search function Example: find out which names contain the letter e select *from emp where ename like '%e%'; Exercise: query the employees whose names end with e select *from emp where ename like '%e'; Query the employee whose last character in the name is e select *from emp where ename li ...

1. Experimental purpose Master the definition and maintenance methods of entity integrity, reference integrity and user-defined integrity.     2. Experimental contents and requirements Define entity integrity and delete entity integrity. Be able to write two ways to define entity integrity   SQL   Statement: define e ...

Welcome to the MySQL technical articles shared by the great SQL community. If you have any questions or want to learn, you can leave a message in the comment area below. After seeing it, you will answer itThis article is reproduced from the official account of WeChat, "old leaf teahouse".After the whole MGR cluster is hung up, the mas ...

Welcome to the MySQL technical articles shared by the great SQL community. If you have any questions or want to learn, you can leave a message in the comment area below. After seeing it, you will answer it0. IntroductionWith the same account and password, the manual client connection can succeed, but it fails through MySQL Connectors. Why?1. Ph ...

9 establishment, addition, deletion and modification of table 9.1 table creation (table creation) Syntax format of table creation: (table creation belongs to DDL statement, and DDL includes: create drop alter) create table Table name(Field name 1 data type, Field name 2 data type, Field name 3 data type); create table Table name( Field na ...