MySQL design conventions that technical students need to know to protect your database development!

The MySQL design conventions that technical students need to know will protect your database development!

MySQL, as a commonly used relational database management system, is widely used in various application scenarios. In the database design and development process, good protocols are the key to ensuring efficient and reliable operation of the database system. This article will provide technical students with a MySQL design protocol to help you protect your database development.

1. Naming convention

1. Table names and field names must all use lowercase letters. You can use underscores to separate words and avoid using special characters or keywords.

2. It is prohibited to use MySQL reserved keywords as table names and field names to avoid conflicts.

3. Table names and field names should have specific meanings, and try to avoid using abbreviations or abbreviations to improve the readability and maintainability of the code.

2. Data type specification

1. Choose the appropriate data type according to actual needs and avoid excessive use of varchar or Text types to save storage space.

2. Avoid using float or double types to store currency and other data that require high precision. It is recommended to use decimal types.

3. Use enumeration types or set types appropriately and avoid using strings to store fixed value ranges.

3. Index specification

1. Reasonably select the index fields and determine whether to create an index based on the query frequency and the uniqueness of the fields.

2. Avoid creating too many indexes to avoid wasting storage space and affecting performance.

3. Create indexes for frequently queried fields to improve query efficiency.

4. Table structure specification

1. Follow the paradigm principles of database design to avoid data redundancy and invalid data dependence.

2. Put highly related fields in one table and avoid putting irrelevant fields in the same table.

3. Decompose a large table into multiple small tables to improve query performance and reduce data redundancy.

5. Constraint specification

1. Add primary key constraints to the table to ensure data integrity and accuracy.

2. Add foreign key constraints to the table, establish relationships between tables, and set up cascade operations to ensure data consistency.

3. Set the default value of the field, non-null constraints, etc. to avoid inserting invalid or missing data.

6. SQL Writing Protocol

1. Avoid using wildcard queries and use specific conditional queries as much as possible to improve query efficiency.

2. Use transactions rationally to ensure data consistency and concurrency control.

3. It is prohibited to directly splice SQL statements in business code to prevent SQL injection attacks. It is recommended to use parameterized queries.

7. Performance Optimization Protocol

1. Avoid using SELECT * and only query the required fields to reduce network transmission and database load.

2. Avoid using a large number of subqueries and nested queries, and consider using join queries or temporary table optimization.

3. Use cache rationally to reduce the frequency of database access and improve performance.

The above are the MySQL design rules that technical students need to know to help you protect your database development. By following these protocols, the stability, reliability, and maintainability of the system can be improved. At the same time, during the actual development process, we should also make reasonable optimization and adjustments based on specific business needs and actual situations to maximize the performance and functions of MySQL. I believe that as long as you follow the protocols, your database development will be able to get twice the result with half the effort and effectively improve the quality and efficiency of the project.

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