Peter studies the theory of relational databases. Table in the relational database consists of values that are arranged in rows and columns. There are different normal forms that database may adhere to. Normal forms are designed to minimize the redun…
Input Input contains several datasets. The first line of each dataset contains two integer numbersn and m (1n10000, 1m10), the number of rows and columns in the table. The following n lines contain table rows. Each row hasm column values separated by…
I mean your borrowers of books - those mutilators of collections, spoilers of the symmetry of shelves, and creators of odd volumes. - (Charles Lamb, Essays of Elia (1823) `The Two Races of Men')Like Mr. Lamb, librarians have their problems with borro…
扫扫关注"茶爸爸"微信公众号 坚持最初的执着,从不曾有半点懈怠,为优秀而努力,为证明自己而活. Mapper XML Files The true power of MyBatis is in the Mapped Statements. This is where the magic happens. For all of their power, the Mapper XML files are relatively simple. Certainly if you were to…
linux 命令中英文对照,收集 linux 命令英文全文 Is Linux CLI case-sensitive? The answer is, yes. If you try to run LS instead of ls, it would display an error. There are some advantages of using a case-sensitive command line. The computers that existed in earlier de…
总结: 1.mybaits配置工2方面: i行为配置,如数据源的实现是否利用池pool的概念(POOLED – This implementation of DataSource pools JDBC Connection objects to avoid the initial connection and authentication time required to create a new Connection instance.This is a popular approach fo…
EntityTypeConfiguration Class in Code-First: Before we start to configure using Fluent API, let's see an important class of Fluent API. EntityTypeConfiguration is an important class in Fluent API. EntityTypeConfiguration provides you important method…
3 深入解析controlfile Control file: dump SQL> alter session set events 'immediate trace name controlf level 2'; Session altered SQL> select * from v$diag_info; /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_16425.trc 分析控制文件的1号块 bbed BBED> set fi…