Database Design Principles

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How a single commit and multiple commit affect the IOPS of the system.

How a single commit and multiple commit affect the IOPS of the system.Zookeeper The name and sensitive number desensitization statement in this article: In order to protect personal privacy, the real name of the expert is desensitized and replaced

Measure object size function performance comparison and object function performance comparison

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MySQL schema and binary log disk space trend analysis, schemabinary

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Common oracle index creation rules, oracle index creation rules

Common oracle index creation rules, oracle index creation rules 1. The table's primary key and foreign key must have an index; 2. Indexes should be available for tables with more than 300 of the data volume; 3. For tables that are often connected

Oracle performance optimization operation 4: Remove & quot; IN & quot;, & quot; OR & quot; whenever possible. oracle Performance Optimization

Oracle performance optimization operation 4: Remove "IN", "OR" whenever possible, oracle Performance Optimization The Where clause containing "IN" and "OR" usually uses a worksheet to invalidate the index; If a large number of duplicate values are

Oracle performance optimization operation 1: Avoid Column Operations and optimize oracle Performance

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MySQL self-study (10) -- date functions and mysql self-study date functions

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Oracle arithmetic operations, oracle Arithmetic In Oracle's default installation, a SCOTT user has been created. The default password is tiger, which has four tables:Employee table (EMP), department table (DEPT), salary Registration Form and bonus

Simple oracle query, simple oracle

Simple oracle query, simple oracle Data Query uses the SELECT command to extract information from the database table. Syntax structure: simple query SELECT * | column name | expression FROM table name WHERE condition order by column name Syntax

Oracle deletes data and oracle deletes data.

Oracle deletes data and oracle deletes data. The syntax for Oracle to delete data in a table is: Syntax structure: Delete from table name WHERE Condition Code Demonstration: SQL> delete from infos where stuid = 's100103 '; 1 row deleted SQL>

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