1.创建存储过程 Createprocedureprocedure_namebegin---end; 2.创建函数 Createfunctionfunction_name 3.定义存储过程和函数的参数 Parameter_nametype; 如: nameint; 4.关于存储过程和函数的表达式 1)声明变量 Declarevar_nametype 【 defaultvalue 】 2)
1. 创建存储过程
Create procedure procedure_name begin --- end ;
2. 创建函数
Create function function_name
3. 定义存储过程 和 函数 的参数
Parameter_name type ;
如: name int ;
4. 关于存储过程 和函数的表达式
1) 声明变量
Declare var_name type 【 default value 】
2) 赋值变量
Set var_name = expr
3) 使用 select .... Into 实现赋值
Select filed_name into var_name from table_name where condition(条件);
4) 定义条件
Declare condition_name condition for condition_value ;
5. 删除存储过程 和 函数
Drop procedure procedure_name ;
Drop function function_name ;
6. 修改 存储过程 和函数
Alter procedure procedure_name [ 修改 内容语句 ]
Alter function function_name [ 修改 语句 ]
7.使用流程语句
If search_condition then statement_list
. . .
End if
Case case_value
When when_value then statement_list
...
Else statement_list
End case
8.循环控制语句
1) [ begin_label : ] loop
Statement_list
End loop [ end_loop ]
Leave begin_label //
2) [ begin_label : ] while searcg_condition do
Statement_list
End while [ end lable ]
3) [ begin_label : ] repeat search_condition do
Statement_list
End repeat [ end_list ]
9.查看 存储过程 和 函数
1)通过 show status 语句查看函数和存储过程
Show procedure status [ like ‘pattern’ ]
Show function stutus [ like ‘pattern’ ]
2)通过 系统表 information_schema.routines 查看函数和存储过程
Use information_schema
Select * from routines //
3)通过 show create 语句查看函数和存储过程]

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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