This article will combine with the example demo, expound 30 suggestions about optimizing SQL, most of which are summarized in the actual development, hope to...
Database fields allow null values, will encounter some problems, some knowledge points included here, and we talk about a chat. The id is a non-unique...
To prepare for deployment, create the sample table and sample data first. Paging optimization Here, paging queries the 10 pieces of data after the 10,000th...
Stored procedures encapsulate our code (PLSQL, T-SQL) just like functions in our programming language. It was written in a way that we certainly could not...
Use lowercase letters, digits (usually not required), and underscores. Do not use '-'. The name is simple and clear. Support for transactions, support for row-level...
MySQL is widely used in the Internet industry. However, for advanced Web interviewers, especially those looking for a job under 30K, many MySQL related knowledge...
Premise, you are development, not DBA, not operations. Secondly, the following are all suggestions, specific or subject to the company's regulations. The general specification engine...
As a program ape/yuan, in the development of business functions, often consider the efficiency of SQL execution, then, how to see a SQL execution efficiency...