在PostgreSQL 中,CREATE TABLE ... AS SELECT 语句用于根据 SELECT 语句的结果创建一个新表,并将 SELECT 查询的结果插入到新表中。以下是关于该语句的详细解释: 1. 基本用法 sql CREATE TABLE new_table_name AS SELECT column1, column2, ... FROM existing_table_name WHERE condition; new_table_name ...
Postgres allows us to create a table via the SELECT command; for this purpose, the CREATE TABLE statement is used along with an AS clause followed by a SELECT statement. The newly created table will have the same table structure (e.g., column names, data types, etc.) as the columns in...
INSERT INTO table_name[ (column1 [, column2 ]) ] SELECT[ *|column1 [, column2 ]]FROMtable1[, table2 ][ WHERE VALUE OPERATOR ] 实例 假设COMPANY1 的结构与 COMPANY 表相似,且可使用相同的 CREATE TABLE 进行创建,只是表名改为 COMPANY1。现在把整个 COMPANY 表复制到 COMPANY1 首先给出对应两...
CREATE TABLE AS SELECT 语句 CREATE TABLE LIKE 语句 CREATE TABLE AS TABLE 语句 SELECT INTO 语句 CREATE TABLE INHERITS 语句 PostgreSQL 提供了多种不同的复制表的方法,它们的差异在于是否需要复制表结构或者数据。 CREATE TABLE AS SELECT 语句可以用于复制表结构和数据,但是不会复制索引。 我们可以使用以下语句...
This tutorial works for PostgreSQL anywhere. If you need cloud Postgres, get the generous free plan on Neon. Summary: in this tutorial, you will learn how to use the PostgreSQL CREATE TABLE statement to create a new table. Introduction to PostgreSQL CREATE TABLE statement Typically, a relational...
This document discusses how to create table in PostgreSQL using command line, pgAdmin III and phpPgAdmin. For ease of understanding, each process is complemented by screenshots taken while doing.
PostgreSQL INSERT INTO 语句用于向表中插入新记录。 我们可以插入一行也可以同时插入多行。 INSERT INTO TABLE_NAME (column1, column2, column3,...columnN) VALUES (value1, value2, value3,...valueN); 1. 2. column1, column2,...columnN 为表中字段名。
postgresql create table 自增主键 plsql建表主键自增 一、创建表 create table testTable ( Id numbere, name varchar2(100), age number, createTime date, primary key(Id) ) 1. 2. 3. 4. 5. 6. 7. 8. 二、创建序列 create sequence seq_test...
2.Create Table As 表可以通过查询结果创建，例如CREATE TABLE table_b AS SELECT id, name FORM ...
v_constraint_comment_record record;BEGIN-- grab the oid of the table; https://www.postgresql.org/docs/8.3/catalog-pg-class.htmlSELECTc.oid, c.relkindINTOv_table_oid, v_table_typeFROMpg_catalog.pg_class cLEFTJOINpg_catalog.pg_namespace nONn.oid=c.relnamespaceWHEREc.relkindin('r','p...