CREATE TABLE 新表 LIKE 旧表 复制旧表的数据到新表(假设两个表结构一样) INSERT INTO 新表 SELECT * FROM 旧表 1. 复制旧表的数据到新表(假设两个表结构不一样) INSERT INTO 新表(字段1,字段2,...) SELECT 字段1,字段2,... FROM 旧表 如果是 SQL SERVER 2008 复制表结构,使用如下方法: 1. 2...
In Postgres, theCREATE TABLE ASstatement allows us to create a table from an existing one. It creates the table based on the result-set retrieved by the SELECT query. Follow the below syntax to avail the functionality of the Postgres’CREATE TABLE ASstatement: CREATETABLEnew_tabASSELECTcol_lis...
heap_create_with_catalog:表创建函数 11.heap_create:表创建 12.table_relation_set_new_filenode:创建表的函数指针 13.heapam_relation_set_new_filenode:实际的执行标创建的函数 14.RelationCreateStorage:构建磁盘的表文件 // 如果是根据tablespace oid,database oid,table oid创建一个数据库表 15.smgrcreate-...
"select tablename from pg_tables where schemaname='public'" —— 得到所有用户自定义表的名字(这里"tablename"字段是表的名字,"schemaname"是schema的名字。用户自定义的表,如果未经特殊处理,默认都是放在名为public的schema下) General \copyright show PostgreSQL usage and distribution terms \g [FILE] or ...
如下所示,对于create table基础建表语句,pg_plan_queries没有经过pg_plan_query函数,而是直接创建PlannedStmt节点,然后将query->utilityStmt设置到PlannedStmt节点的utilityStmt成员。 Portal流程 portal = CreatePortal("", true, true);函数创建PortalData结构体,并初始化其中的部分成员,比如portalCo...
postgres=# create or replace view vi as select * from dummy_table where age is NULL; CREATE VIEW 11. 使用select语句创建表 postgres=# select 'My name is X' as col1 , 10 as col2, 'Address is -XYZ location' as col3 into new_table; SELECT 1 postgres=# select * from new_table ...
postgres=#create table t_range (f1 bigint,f2 timestamp default now(), f3 integer) partition by range (f3) begin (1) step (50) partitions (3) distribute by shard(f1); CREATE TABLE postgres=# insert into t_range(f1,f3) values(1,1),(2,50),(3,100),(2,110); ...
例如,我们查看下 select 语句的语法:postgres=# \help SELECT Command: SELECT Description: retrieve rows from a table or view Syntax: [ WITH [ RECURSIVE ] with_query [, ...] ] SELECT [ ALL | DISTINCT [ ON ( expression [, ...] ) ] ] [ * | expression [ [ AS ] output_name ] [...
EXECUTE'SELECT count(*) FROM mytable WHERE inserted_by = $1 AND inserted <= $2'INTOcUSINGchecked_user,checked_date; 本篇简单分析下EXECUTE执行流程。 测试case 代码语言:javascript 代码运行次数:0 运行 AI代码解释 drop table u1tbl;create tableu1tbl(i int);insert into u1tblvalues(1);insert into...
CREATE USER 'ggadmin' IDENTIFIED BY '<ggadmin-password>'; GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT, CREATE,CREATE VIEW, EVENT, INSERT, UPDATE, DROP,EXECUTE, DELETE ON *.* TO 'ggadmin'; サンプル・スキーマを使用してターゲット表を作成します。