闆嗗悎鎿嶄綔鏈夈騫訛紝浜わ紝宸錛撶榪愮畻銆?nbsp;
銆union :寰楀埌涓や釜鏌ヨ緇撴灉鐨勫茍闆嗭紝騫朵笖鑷姩鍘繪帀閲嶅琛屻備笉浼氭帓搴?nbsp;
銆union all:寰楀埌涓や釜鏌ヨ緇撴灉鐨勫茍闆嗭紝涓嶄細鍘繪帀閲嶅琛屻備篃涓嶄細鎺掑簭
銆intersect:寰楀埌涓や釜鏌ヨ緇撴灉鐨勪氦闆嗭紝騫朵笖鎸夌収緇撴灉闆嗙殑絎竴涓垪榪涜鎺掑簭
銆minus:寰楀埌涓や釜鏌ヨ緇撴灉鐨勫噺闆嗭紝浠ョ涓鍒楄繘琛屾帓搴?nbsp;
渚嬪瓙錛?nbsp;
銆銆涓嬮潰鏄袱涓〃錛氫竴涓富淇紼嬭〃錛屼竴涓変慨璇劇▼琛ㄣ?nbsp;
榪欎釜鏄富淇紼嬭〃錛歮inors
銆銆 create table minors(
銆minor_id number primary key,
銆 minor_name varchar2(30) not null,
銆 credit_hour number(2)
銆 )
鎻掑叆錛撴潯璁板綍錛氥銆銆銆銆銆銆銆銆銆銆銆銆銆銆
銆銆 insert into minors values(10101,'璁$畻鏈哄師鐞?,4)
銆 insert into minors values(10201,'鑷姩鎺у埗鍘熺悊',3)
銆 insert into minors values(10301,'宸ョ▼鍒跺浘鍘熺悊',4)
涓嬮潰鍒涘緩閫変慨璇劇▼琛╩inors2
銆 create table minors2(
minor_id number primary key,
minor_name varchar2(30) not null,
credit_hour number(2)
)
鎻掑叆涓ゆ潯璁板綍錛?nbsp;
insert into minors2 values(10201,'鑷姩鎺у埗鍘熺悊',3)
insert into minors2 values(10301,'宸ョ▼鍒跺浘鍘熺悊',4)
涓や釜琛ㄤ嬌鐢╱nion all:寰楀埌濡備笅緇撴灉
select minor_id,minor_name,credit_hour from minors union all
select minor_id,minor_name,credit_hour from minors2 order by credit_hour
緇撴灉錛?nbsp;
MINOR_ID MINOR_NAME CREDIT_HOUR
---------- ------------------------------ -----------
10201 鑷姩鎺у埗鍘熺悊 3
10201 鑷姩鎺у埗鍘熺悊 3
10101 璁$畻鏈哄師鐞? 4
10301 宸ョ▼鍒跺浘鍘熺悊 4
10301 宸ョ▼鍒跺浘鍘熺悊 4
涓や釜琛ㄤ嬌鐢╱nion銆:寰楀埌濡備笅緇撴灉
select minor_id,minor_name,credit_hour from minors union
select minor_id,minor_name,credit_hour from minors2 order by credit_hour
緇撴灉錛?nbsp;
MINOR_ID MINOR_NAME CREDIT_HOUR
---------- ------------------------------ -----------
10201 鑷姩鎺у埗鍘熺悊 3
10101 璁$畻鏈哄師鐞? 4
10301 宸ョ▼鍒跺浘鍘熺悊 4
涓や釜琛ㄤ嬌鐢╥ntersect銆:寰楀埌濡備笅緇撴灉
select minor_id,minor_name,credit_hour from minors intersect
select minor_id,minor_name,credit_hour from minors2
緇撴灉錛?nbsp;
MINOR_ID MINOR_NAME CREDIT_HOUR
---------- ------------------------------ -----------
10201 鑷姩鎺у埗鍘熺悊 3
10301 宸ョ▼鍒跺浘鍘熺悊 4
涓や釜琛ㄤ嬌鐢╩inus銆:寰楀埌濡備笅緇撴灉
select minor_id,minor_name,credit_hour from minors minus
select minor_id,minor_name,credit_hour from minors2
緇撴灉錛?nbsp;
MINOR_ID MINOR_NAME CREDIT_HOUR
---------- ------------------------------ -----------
10101 璁$畻鏈哄師鐞? 4