The command to reclaim user operation permissions in sql is
In SQL, the command to revoke user operation permissions is REVOKE, and its syntax is as follows: REVOKE [GRANT OPTION FOR] <Permissions> ON
The command to revoke user operation permissions in SQL
In SQL, the command to revoke user operation permissions isREVOKE.
Use REVOKE command
REVOKE The syntax of the command is as follows:
<code>REVOKE [GRANT OPTION FOR] <权限> ON <对象> FROM <用户></code>
Among them:
-
[GRANT OPTION FOR]: Optional parameter, specifying whether to also recycle options for granting permissions. -
<Permissions>: The permission to be reclaimed can be one of the following:SELECTINSERTUPDATEDELETE-
CREATE DROP
- ##
: The user whose permissions are to be revoked.
Example
The following example recycles useruser1's SELECT on table table1 Permissions:
REVOKE SELECT ON table1 FROM user1;
user2 to view view1, including granting permissions:
REVOKE ALL PRIVILEGES ON view1 FROM user2;
Notes
- Only users with administrator rights can reclaim the rights of other users.
- If the user has multiple permissions on the object, the
- REVOKE
command will only revoke the specified permissions. To reclaim all privileges, useALL PRIVILEGES.Options granted permission can only be reclaimed by the user who granted the permission.
The above is the detailed content of The command to reclaim user operation permissions in sql is. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1672
14
1428
52
1332
25
1277
29
1257
24
SQL: The Commands, MySQL: The Engine
Apr 15, 2025 am 12:04 AM
SQL commands are divided into five categories in MySQL: DQL, DDL, DML, DCL and TCL, and are used to define, operate and control database data. MySQL processes SQL commands through lexical analysis, syntax analysis, optimization and execution, and uses index and query optimizers to improve performance. Examples of usage include SELECT for data queries and JOIN for multi-table operations. Common errors include syntax, logic, and performance issues, and optimization strategies include using indexes, optimizing queries, and choosing the right storage engine.
SQL and MySQL: Understanding the Core Differences
Apr 17, 2025 am 12:03 AM
SQL is a standard language for managing relational databases, while MySQL is a specific database management system. SQL provides a unified syntax and is suitable for a variety of databases; MySQL is lightweight and open source, with stable performance but has bottlenecks in big data processing.
SQL vs. MySQL: Clarifying the Relationship Between the Two
Apr 24, 2025 am 12:02 AM
SQL is a standard language for managing relational databases, while MySQL is a database management system that uses SQL. SQL defines ways to interact with a database, including CRUD operations, while MySQL implements the SQL standard and provides additional features such as stored procedures and triggers.
SQL: How to Overcome the Learning Hurdles
Apr 26, 2025 am 12:25 AM
To become an SQL expert, you should master the following strategies: 1. Understand the basic concepts of databases, such as tables, rows, columns, and indexes. 2. Learn the core concepts and working principles of SQL, including parsing, optimization and execution processes. 3. Proficient in basic and advanced SQL operations, such as CRUD, complex queries and window functions. 4. Master debugging skills and use the EXPLAIN command to optimize query performance. 5. Overcome learning challenges through practice, utilizing learning resources, attaching importance to performance optimization and maintaining curiosity.
SQL and MySQL: A Beginner's Guide to Data Management
Apr 29, 2025 am 12:50 AM
The difference between SQL and MySQL is that SQL is a language used to manage and operate relational databases, while MySQL is an open source database management system that implements these operations. 1) SQL allows users to define, operate and query data, and implement it through commands such as CREATETABLE, INSERT, SELECT, etc. 2) MySQL, as an RDBMS, supports these SQL commands and provides high performance and reliability. 3) The working principle of SQL is based on relational algebra, and MySQL optimizes performance through mechanisms such as query optimizers and indexes.
The Importance of SQL: Data Management in the Digital Age
Apr 23, 2025 am 12:01 AM
SQL's role in data management is to efficiently process and analyze data through query, insert, update and delete operations. 1.SQL is a declarative language that allows users to talk to databases in a structured way. 2. Usage examples include basic SELECT queries and advanced JOIN operations. 3. Common errors such as forgetting the WHERE clause or misusing JOIN, you can debug through the EXPLAIN command. 4. Performance optimization involves the use of indexes and following best practices such as code readability and maintainability.
SQL in Action: Real-World Examples and Use Cases
Apr 18, 2025 am 12:13 AM
In practical applications, SQL is mainly used for data query and analysis, data integration and reporting, data cleaning and preprocessing, advanced usage and optimization, as well as handling complex queries and avoiding common errors. 1) Data query and analysis can be used to find the most sales product; 2) Data integration and reporting generate customer purchase reports through JOIN operations; 3) Data cleaning and preprocessing can delete abnormal age records; 4) Advanced usage and optimization include using window functions and creating indexes; 5) CTE and JOIN can be used to handle complex queries to avoid common errors such as SQL injection.
SQL: The Language of Databases Explained
Apr 27, 2025 am 12:14 AM
SQL is the core tool for database operations, used to query, operate and manage databases. 1) SQL allows CRUD operations to be performed, including data query, operations, definition and control. 2) The working principle of SQL includes three steps: parsing, optimizing and executing. 3) Basic usages include creating tables, inserting, querying, updating and deleting data. 4) Advanced usage covers JOIN, subquery and window functions. 5) Common errors include syntax, logic and performance issues, which can be debugged through database error information, check query logic and use the EXPLAIN command. 6) Performance optimization tips include creating indexes, avoiding SELECT* and using JOIN.
