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
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...
alter sequence"t_user_ID_seq"restartwith1increment by1;--创建主键序列 drop indexifexists"t_user_pkey";alter table"t_user"add constraint"t_user_pkey"primarykey("ID"); 根据已有表结构创建表 代码语言:javascript 代码运行次数:0 运行 AI代码解释 create tableifnot exists新表(like 旧表 including i...
$function$;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
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. ...
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 ...
(1 row) --由于历史原因,ALTER TABLE 也可以用于视图 postgres=# alter table if exists emp_view rename to emp_view2; ALTER TABLE postgres=# \dv List of relations Schema | Name | Type | Owner ---+---+---+--- public | emp_view2 | view | postgres (1 row) 删除视图 代码语言:java...
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...
);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 ...