ALTER DEFAULT PRIVILEGES PDFRSS Defines the default set of access permissions to be applied to objects that are created in the future by the specified user. By default, users can change only their own default access permissions. Only a superuser can specify default permissions for other users....
Amazon Redshift Database Developer Guide Best practices Tutorials Machine learning PDFRSS Use the ALTER DEFAULT PRIVILEGES statement to define the default set of access permissions to be applied to objects that are created in the future by the specified user. By default, users can change only thei...
为了保证每个表都是列级权限控制的,我们使用 ALTER DEFAULT PRIVILEGES 来定义默认访问权限集,这些默认访问权限集可以应用于未来创建的表。在创建完表之后,我们可以通过REVOKE 语句回收所有列的访问权限,再为每个角色创建列的权限,达到列级别权限访问控制的目的。
CREATE GROUP readwrite; ALTER DEFAULT PRIVILEGES IN SCHEMA finance GRANT SELECT on TABLES to GROUP readonly; GRANT USAGE on SCHEMA finance to GROUP readonly; GRANT SELECT on ALL TABLES in SCHEMA finance to GROUP readonly; ALTER DEFAULT PRIVILEGES IN SCHEMA finan...
请记住，您只对已经存在的表授予权限。不适用于稍后创建的表。为了包括这些，也包括：...
root@localhost [testdb]>alter table t1 modify c2 varchar(90); root@localhost [testdb]>desc t1; +---+---+---+---+---+---+ | Field | Type | Null | Key | Default | Extra | +---+---+---+---+---+---+ | c1
root@localhost [testdb]>alter table t1 modify c2 varchar(90); root@localhost [testdb]>desc t1; +---+---+---+---+---+---+ | Field | Type | Null | Key | Default | Extra | +---+---+---+---+---+---+ | c1
CREATEUSERsales_person1password'xyzzy-1-XYZZY';ALTERGROUPsalesADDUSERsales_person1;CREATEUSERmarketing_person1password'xyzzy-1-XYZZY';ALTERGROUPmarketingADDUSERmarketing_person1;CREATEUSERmarketing_and_salespassword'xyzzy-1-XYZZY';ALTERGROUPmarketingADDUSERmarketing_and_sales;ALTERGROUPsalesADDUSERmarketing_and...
简介:首先需要知道的是redshift不支持SQL语法直接修改varchar(60) 到varchar(90),但PostgreSQL和MySQL都支持。1.PostgreSQL如何修改varchar(60)到varchar(90)?Syntax:ALTER TABLE [ IF EXISTS ] [ ONLY ] name [ * ] action [, . 首先需要知道的是redshift不支持SQL语法直接修改varchar(60) 到varchar(90),但...
ALTER DATABASE ALTER DATASHARE ALTER DEFAULT PRIVILEGES ALTER EXTERNAL VIEW ALTER FUNCTION ALTER GROUP ALTER IDENTITY PROVIDER ALTER MASKING POLICY ALTER MATERIALIZED VIEW ALTER RLS POLICY ALTER ROLE ALTER PROCEDURE ALTER SCHEMA ALTER SYSTEM ALTER TABLE ...