CREATETABLEmy_table ( id SERIALPRIMARYKEY, nameVARCHAR(100) ) TABLESPACE my_tablespace; 5. 示例 5.1 创建简单表 创建一个包含员工信息的简单表: CREATETABLEemployees ( emp_id SERIALPRIMARYKEY, first_nameVARCHAR(50)NOTNULL, last_
postgres=# 创建表 创建表之前要连接指定的数据库 \c test; CREATETABLEtable_name( column1 datatype, column2 datatype, column3 datatype, ... columnN datatype,PRIMARYKEY(oneormore columns ) ); 写法1: test=#createtablecompany(idintprimarykeynotnull, name textnotnull, ageintnotnull,addresschar...
CREATE TABLE COMPANY( ID INT PRIMARY KEY NOT NULL, NAME TEXT NOT NULL, AGE INT NOT NULL, ADDRESS CHAR(50), SALARY REAL ); 1. 2. 3. 4. 5. 6. 7. 让无涯教程再创建一个表,无涯教程将在后续章节的练习中使用该表- CREATE TABLE DEPARTMENT( ID INT PRIMARY KEY NOT NULL, DEPT CHAR(50)...
postgres=# drop database testdb; DROP DATABASE postgres=# 1. 2. 3. 4. 创建表 创建表之前要连接指定的数据库 \c test; CREATE TABLE table_name( column1 datatype, column2 datatype, column3 datatype, ... columnN datatype, PRIMARY KEY( one or more columns ) ); 1. 2. 3. 4. 5. ...
CREATE TABLE 语法格式如下: CREATE TABLE table_name( column1 datatype, column2 datatype, column3 datatype, ... columnN datatype, PRIMARY KEY( 一个或多个列 ) ); CREATE TABLE 是一个关键词,用于告诉数据库系统将创建一个数据表。 表名字必需在同一模式中的其它表、 序列、索引、视图或外部表名字...
-- 创建日志表 CREATE TABLE user_delete_log ( id SERIAL PRIMARY KEY, user_id INT NOT NULL, deleted_at TIMESTAMP NOT NULL ); -- 创建触发器函数 CREATE OR REPLACE FUNCTION log_user_delete() RETURNS TRIGGER AS $$ BEGIN INSERT INTO user_delete_log (user_id, deleted_at) VALUES (OLD.id,...
Schema|Name|Type|Owner---+---+---+---public|company|table|postgrespublic|department|table|postgres(2rows) \d tablename查看表格信息: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 runoobdb=# \d company Table"public.company"Column|Type|Collation...
DO$$BEGINCREATETABLEIFNOTEXISTStest_info( test_idINTPRIMARYKEY, std_nameTEXT, scoreINT); RAISE NOTICE 'Welcome to commandprompt.com';END$$; This time a notice is raised indicating that the relation to be created already exists in the database. Postgres skips the “CREATE TABLE” statement ...
postgres=# create type new_box as (upper point, lower point); CREATE TYPE postgres=# create type tt as (c1 int, c2 int, c3 timestamp); CREATE TYPE 不需要构造器,直接输入并制定类型即可: postgres=# select ('(1,2)', '(3,9)')::new_box; row --- ("(1,2)","(3,9)") (1...
A simple implementation of a bulk_create that sets primary keys on inserted objects. Includes a test and slightly modified docs. Only tested on postgres_psycopg2, so I need someone to test it on the Oracle backend. Applies to 22198e6c (current master) ...