ALTER TABLE [ IF EXISTS ] name DETACH PARTITION partition_name [ CONCURRENTLY | FINALIZE ] whereaction is one of: ADD [ COLUMN ] [ IF NOT EXISTS ] column_name data_type [ COLLATE collation ] [ column_constraint [ ... ] ] DROP [ COLUMN ] [ IF EXISTS ] column_name [ RESTRICT | C...
CREATESEQUENCEIFNOTEXISTSid_no START10000; 6.分配数据库表权限给用户 --赋予用户表权限ALTERTABLEmy_table OWNERTOuser_name;--赋予用户所有表权限GRANTALLONmy_tableTOuser_name;--赋予用户表的增删改查权限GRANTINSERT,UPDATE,DELETE,SELECTONmy_tableTOuser_name;--将此表的SELECT权限赋给所有用户GRANTSELECTON...
$function$;ALTERFUNCTIONpublic.function2(charactervarying,integer,timestampwithout time zone) OWNERTOpostgres; 其中用IF EXISTS判断表是否存在,存在则删除 DROPTABLEIFEXISTStableName
DROP TABLE IF EXISTS links; CREATE TABLE links ( link_id serial PRIMARY KEY, title VARCHAR (512) NOT NULL, url VARCHAR (1024) NOT NULL ); To add a new column named active, you use the following statement: ALTER TABLE links ADD COLUMN active boolean; The following statement removes the ...
alter user 用户名setdefault_transaction_read_only=on;#设置可操作的数据库 grant all on database 数据库名 to 用户名;#设置可操作的模式和权限 grant select,insert,update,deleteon all tablesinschemapublicto 用户名; 撤回权限 代码语言:javascript ...
ALTER TABLE [ IF EXISTS ] name DETACH PARTITION partition_name; 删除分区及其中数据(与删除表方法相同) DROP TABLE [ IF EXISTS ] partition_name [, ...] [ CASCADE | RESTRICT ] RESTRICT:缺省选项,如果有任何对象依赖该表则拒绝删除该表。 CASCADE:自动删除依赖于表的对象(例如视图),然后自动删除依赖于...
The partitioned table is itself empty. A data row inserted into the table is routed to a partition based on the value of columns or expressions in the partition key. If no existing partition matches the values in the new row, an error will be reported. ...
);RETURN QUERY select car.loading_info from dy_VehicleList drop table IF EXISTS public.temp_ids;END;$function$;ALTER FUNCTION public.function2(character varying,integer,timestamp without time zone)OWNER TO postgres;其中⽤IF EXISTS判断表是否存在，存在则删除 DROP TABLE IF EXISTS tableName ...
原文: PostgreSQL 13: ALTER TABLE命令新增DROP EXPRESSION选项 Generated Columns特性是PostgreSQL 12 版本新增的,支持定义表的字段为Generated Columns,其值依赖于根据其它字段进行表达式计算。 之前写了篇博客介绍Generated Columns特性,详见: PostgreSQL 12: 支持 Generated Columns 特性 如果表定义了Generated Columns字段...
ALTERTABLE[IFEXISTS]nameDETACHPARTITIONpartition_name[FINALIZE|CONCURRENTLY] 在2个运行的事务中,允许一个分区从他的分区表中分离而不阻塞当前查询。因为在2个事务中运行,所以不能在一个事务块中使用。如果第2个事务取消或发生崩溃,则有ALTER TABLE...DETACH PARTITION...FINALIZE,执行最后的步骤。