SQL语句Alias

2023年10月23日 243次阅读来源: SQL

SQL Alias

表的 SQL Alias 语法

SELECT COLUMN_NAME(S) FROM TABLE_NAME AS ALIAS_NAME

列的 SQL Alias 语法

SELECT COLUMN_NAME AS ALIAS_NAME FROM TABLE_NAME

CAR表:

VIN	BRAND	MODEL	PRICE	PRODUCTION_YEAR
LJCPCBLCX14500264	Ford	Focus	8000	2005
WPOZZZ79ZTS372128	Ford	Fusion	10000	2008
JF1BR93D7BG498281	Toyota	Avensis	10000	1999
KLATF08Y1VB363636	Volkswagen	Golf	3000	1992
1M8GDM9AXKP042788	Volkswagen	Golf	10000	2010
1HGCM82633A004352	Volkswagen	Jetta	6000	2003
1G1YZ23J9P5800003	Fiat	Punto	6000	1999
GS723HDSAK2399002	Opel	Corsa	89000.00	2007
LP859CCSRH5555963	Toyota	Avensis	12000.00	2009
LP859CCSRH5555962	Opel	Punto	13000.00	2012

BICYCLE表:

IDENTIFIER	ALIAS	BRAND	PRICE	PRODUCTION_YEAR
AKSLNF355	小红单车	Mobike	1.00	2015
BVSLNF385	小黄单车	Ofo	1.00	2015

– Alias 实例: 使用表名称别名
我们有两张表CAR和BICYCLE，分别指定别名C和B，
我们列出BRAND为’Mobike’和’Ford’的数据

SELECT CAR.VIN,BICYCLE.IDENTIFIER,CAR.MODEL,BICYCLE.ALIAS,BICYCLE.BRAND,BICYCLE.PRODUCTION_YEAR FROM CAR,BICYCLE WHERE CAR.BRAND='Ford' AND BICYCLE.BRAND='Mobike';

使用别名:

SELECT C.VIN,B.IDENTIFIER,C.MODEL,B.ALIAS,B.BRAND,B.PRODUCTION_YEAR FROM CAR AS C,BICYCLE AS B WHERE C.BRAND='Ford' AND B.BRAND='Mobike';

PS:在使用别名的时候有的不支持AS

SELECT C.VIN,B.IDENTIFIER,C.MODEL,B.ALIAS,B.BRAND,B.PRODUCTION_YEAR FROM CAR C,BICYCLE B WHERE C.BRAND='Ford' AND B.BRAND='Mobike';

结果:

VIN	IDENTIFIER	MODEL	ALIAS	BRAND	PRICE	PRODUCTION_YEAR
LJCPCBLCX14500264	AKSLNF355	Focus	小红单车	Mobike	1.00	2015
WPOZZZ79ZTS372128	AKSLNF355	Fusion	小黄单车	Ofo	1.00	2015

    原文作者：SQL
    原文地址: https://blog.csdn.net/qq229200/article/details/62039610
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