Difference between revisions of "REVOKE"
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To revoke access privileges for users to tables. The REVOKE statement can only remove existing user privileges given with the GRANT statement. To revoke privileges you must be the owner of the table or have already been granted ALTER privileges. | To revoke access privileges for users to tables. The REVOKE statement can only remove existing user privileges given with the GRANT statement. To revoke privileges you must be the owner of the table or have already been granted ALTER privileges. | ||
| − | {| class="wikitable" | + | {| class="wikitable" width=100% |
| − | !Keywords||Description | + | !width=25%|Keywords||Description |
|- | |- | ||
|ALL||All privileges are revoked. | |ALL||All privileges are revoked. | ||
|- | |- | ||
| − | |SELECT||The ability to name any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them. | + | |valign="top"|SELECT||The ability to name any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them. |
|- | |- | ||
| − | |UPDATE||The ability to name any column in an UPDATE statement. The privilege can be restricted to one or more columns by listing them. | + | |valign="top"|UPDATE||The ability to name any column in an UPDATE statement. The privilege can be restricted to one or more columns by listing them. |
|- | |- | ||
| − | |INSERT||The ability to INSERT rows into the table. | + | |valign="top"|INSERT||The ability to INSERT rows into the table. |
|- | |- | ||
| − | |DELETE||The ability to DELETE rows from the table. | + | |valign="top"|DELETE||The ability to DELETE rows from the table. |
|- | |- | ||
| − | |ALTER||The data type to be stored in that column, and the applicable length or precision. | + | |valign="top"|ALTER||The data type to be stored in that column, and the applicable length or precision. |
|- | |- | ||
| − | |READ ONLY||The ability to read from any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them. | + | |valign="top"|READ ONLY||The ability to read from any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them. |
|- | |- | ||
| − | |database||The name of the database to which the table belongs. The '!' character must be included between the database name and the table name. | + | |valign="top"|database||The name of the database to which the table belongs. The '!' character must be included between the database name and the table name. |
|- | |- | ||
| − | |table||The name of the table from which to revoke the privileges. | + | |valign="top"|table||The name of the table from which to revoke the privileges. |
|- | |- | ||
| − | |user||The user access control string that will be revoked from the privilege. User access control strings are defined by the operating system. | + | |valign="top"|user||The user access control string that will be revoked from the privilege. User access control strings are defined by the operating system. |
|- | |- | ||
| − | |group||The group access control string that will be revoked the privilege. Group access control strings are defined by the operating system. | + | |valign="top"|group||The group access control string that will be revoked the privilege. Group access control strings are defined by the operating system. |
|- | |- | ||
| − | |PUBLIC||All users and groups will be revoked privileges | + | |valign="top"|PUBLIC||All users and groups will be revoked privileges |
|- | |- | ||
|} | |} | ||
Revision as of 06:35, 22 January 2013
Contents
Purpose
Revoke access privileges for users to tables.
Syntax
REVOKE ALL | [SELECT [(<column> [,...])]] [UPDATE [(<column> [,...])]]
[INSERT] [DELETE] [ALTER] [READ ONLY [(<column> [,...])]
ON [<database>!]<table> FROM '<user>,<group>' [,...] | PUBLIC
See Also
ALTER TABLE, CREATE TABLE, GETENV(), GRANT
Description
To revoke access privileges for users to tables. The REVOKE statement can only remove existing user privileges given with the GRANT statement. To revoke privileges you must be the owner of the table or have already been granted ALTER privileges.
| Keywords | Description |
|---|---|
| ALL | All privileges are revoked. |
| SELECT | The ability to name any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them. |
| UPDATE | The ability to name any column in an UPDATE statement. The privilege can be restricted to one or more columns by listing them. |
| INSERT | The ability to INSERT rows into the table. |
| DELETE | The ability to DELETE rows from the table. |
| ALTER | The data type to be stored in that column, and the applicable length or precision. |
| READ ONLY | The ability to read from any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them. |
| database | The name of the database to which the table belongs. The '!' character must be included between the database name and the table name. |
| table | The name of the table from which to revoke the privileges. |
| user | The user access control string that will be revoked from the privilege. User access control strings are defined by the operating system. |
| group | The group access control string that will be revoked the privilege. Group access control strings are defined by the operating system. |
| PUBLIC | All users and groups will be revoked privileges |
Example
// Revoke update privilege for columns lastname and firstname and insert on the table REVOKE UPDATE (lastname, firstname) INSERT; ON customer; FROM '[20,100]' // Grant all privileges to all users REVOKE ALL; ON test; FROM PUBLIC
