Data table viewing skills in MySQL

As a relational database management system widely used in Web applications, MySQL is a commonly used database platform. When using MySQL, operating data tables is a basic skill. This article will introduce some data table viewing skills in MySQL so that administrators and developers can better understand and utilize this powerful database management system.

1. Use the command line to view the data table

1.1 Query the data table

In MySQL, you can use the SELECT statement to query the data table. For example, if you want to view all records in the data table named "student", you can use the following command:

SELECT * FROM student;

This command uses the wildcard character "*", which means All column values ​​need to be queried. If you only need to query the values ​​of certain columns, you can list the column names one by one, for example:

SELECT id, name, age, gender FROM student;

where id, name, age , gender is the column name to be queried.

1.2 Sorting data table

If you need to sort by a certain column name, you can use the ORDER BY statement. For example:

SELECT id, name, age FROM student ORDER BY age DESC;

DESC means descending sorting, and if it is ascending sorting, use ASC.

1.3 Filtering data tables

WHERE statements are generally used to filter data tables. For example, if you only need to query student records whose age is greater than or equal to 18 years old, you can use the following command:

SELECT id, name, age FROM student WHERE age >= 18;

You can also Use LIKE for fuzzy query, for example:

SELECT id, name FROM student WHERE name LIKE '%张%';

This command will query all student records whose names contain "Zhang".

1.4 Statistical data table

Statistical data table can use SUM, AVG, MAX, MIN and other functions. For example:

SELECT SUM(grade) FROM exam_result;

will query the sum of the grade column in all records in exam_result.

2. Use visualization tools to view data tables

2.1 Navicat for MySQL

Navicat for MySQL is a powerful MySQL database management tool with intuitive and easy-to-use graphics. The interface also provides a rich set of functions, such as the creation, modification and deletion of data tables. Use Navicat for MySQL to view data tables. You can use the table data viewer to perform simple data query, insert, edit, delete and copy operations.

2.2 MySQL Workbench

MySQL Workbench is a visual database management tool officially launched by MySQL. It can design, develop, manage and maintain MySQL databases. It has built-in data model diagrams and databases. and table structure drawing, SQL editor and executor functions. Use MySQL Workbench to view data tables. You can browse through "Table Data" and directly enter SQL query statements.

3. Summary

The above introduces the related techniques of using command line and visualization tools to view data tables in MySQL. Of course, this is just the tip of the iceberg of MySQL. MySQL has many other powerful features, such as stored procedures, triggers, views, etc. These features can greatly improve development efficiency and database management levels. If you need to learn more about MySQL, you can read more official documents and related books to understand the usage and precautions of various features.

The above is the detailed content of Data table viewing skills in MySQL. For more information, please follow other related articles on the PHP Chinese website!