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...
To delete the table select the table, right-click and click on "Delete/Drop". When prompt, say "Yes". Create Table using phpPgAdmin Login to phpPgAdmin and reach "Public" database. Now click on "Create table" in the right hand pane of the phpPgAdmin window. In the next window, supp...
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...
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基于 employee 复制一个新表 emp2,包括表中的数据: 1 2 3 CREATETABLEemp2 ...
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...
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...
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。
With AWS DMS, you can create a new table in a target database by selecting data from one or more tables in a source database using the Oracle and PostgreSQL CREATE TABLE AS SELECT statement. This statement defines a new table by querying data from existi
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...