如何在 SQL 中打印表的结构及其内容
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How to print the structure of a table and its contents in SQL
提问by John Stevens
I've created a simple database using Oracle SQL (iSQL plus). How can I print the table structure and its contents?
我使用 Oracle SQL (iSQL plus) 创建了一个简单的数据库。如何打印表结构及其内容？
采纳答案by Leniel Maccaferri
I know the desccommand:
我知道desc命令：
http://www.riteshmandal.com/oracle.htm
http://www.riteshmandal.com/oracle.htm
DESC or DESCRIBE : Used to describe the table structure present in the tablespace.
USE : DESC e.g. DESC Employee;
USE : SELECT * FROM to view all the data inside the table. e.g. SELECT * FROM Employee
DESC 或 DESCRIBE ：用于描述表空间中存在的表结构。
用途：DESC，例如DESC Employee；
USE : SELECT * FROM 查看表内的所有数据。例如 SELECT * FROM 员工
Example:
例子：
SQL> -- create demo table
SQL> create table Employee(
2 ID VARCHAR2(4 BYTE) NOT NULL,
3 First_Name VARCHAR2(10 BYTE),
4 Last_Name VARCHAR2(10 BYTE),
5 Start_Date DATE,
6 End_Date DATE,
7 Salary Number(8,2),
8 City VARCHAR2(10 BYTE),
9 Description VARCHAR2(15 BYTE)
10 )
11 /
Table created.
SQL>
SQL> desc Employee;
Name Null? Type
-------------------------------------------
ID NOT NULL VARCHAR2(4)
FIRST_NAME VARCHAR2(10)
LAST_NAME VARCHAR2(10)
START_DATE DATE
END_DATE DATE
SALARY NUMBER(8,2)
CITY VARCHAR2(10)
DESCRIPTION VARCHAR2(15)
SQL>
SQL>
SQL>
SQL> -- clean the table
SQL> drop table Employee
2 /
Table dropped.
SQL>
回答by dvb
Two different queries will be used for this. The table to show the table structure is:
为此将使用两个不同的查询。显示表结构的表是：
describe <table_name>;
or
describe table <table_name>;
描述<table_name>;
或
描述表<table_name>；
