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查詢三個欄位的sql

發布時間: 2023-05-18 12:03:09

sql中查詢有三個欄位的記錄相同的語句

select a.ID,a.NAME,a.SPC,a.UT from(select * from PRDT) as a,(select * from PRDT) as bwhere a.NAME=b.NAME and a.SPC=b.SPC and a.UT=b.UT and a.ID<>b.ID order by a.ID試試~

② SQL多表查詢多個欄位

SQL語句格式:

select 欄位1,欄位2,欄位3

from 表1,表2,表3

where 條件

例子:查詢s表中的sno欄位, c表中的cno欄位,j表中的jno欄位

select sno,pno,jno

from s,p,j

(2)查詢三個欄位的sql擴展閱讀:

刪除語句:DELETE * FROM table_name

查詢語句:SELECT * FROM Persons WHERE ROWNUM <= 5

建立視圖:CREATE VIEW view_name AS SELECT column_name(s) FROM table_name WHERE condition

③ SQL查詢2個表得到三個欄位,並且重復的只顯示一條,請問這個語句怎麼寫

SELECT distinct name,name1,name2 FROM A as a left join B as b on a.idd=b.idd

④ SQL中查詢有三個欄位的記錄相同的語句

Select * from PRDT as p1 , PRDT as p2 where p1.NAME=p2.NAME and p1.SPC=p2.SPC and p1.UT=p2.UT
你試試吧,我學的時候老師出過這種題目虛櫻帆,好長時間了,都忘了;
就是把這個表看成頌族是兩張表來差雹查

⑤ sqlserver 資料庫查詢一個時間段根據年月日三個欄位,注意是三個欄位

我剛寫了一個MySQL的類似sql查詢。

1、將年、月、日和小時組合成一個字元串

2、月日時如果不是兩位,在前面補0

3、將字元和判斷區間的字元串值進行比較

select * from 表 where CONCAT(vyear
,LPAD(vmonth
,2,0),LPAD(vday,2,0),LPAD(Hour,2,0)) >= '2017081000' and CONCAT(vyear,LPAD(vmonth,2,0),LPAD(vday,2,0),LPAD(Hour,2,0)) <= '2017081023'

⑥ sql 單表多欄位查詢,查出下表3個(或更多)欄位中,任意帶有12字元串的數據。

1.查詢資料庫中的所有資料庫名:
SELECT Name FROM Master..SysDatabases ORDER BY Name

2.查詢某個資料庫中所有的表名:
SELECT Name FROM SysObjects Where XType='U' ORDER BY Name

3.查詢表結構信息:

1 SELECT (case when a.colorder=1 then d.name else null end) 表名,
2 a.colorder 欄位序號,a.name 欄位名,
3 (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) 標識,
4 (case when (SELECT count(*) FROM sysobjects
5 WHERE (name in (SELECT name FROM sysindexes
6 WHERE (id = a.id) AND (indid in
7 (SELECT indid FROM sysindexkeys
8 WHERE (id = a.id) AND (colid in
9 (SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name)))))))
10 AND (xtype = 'PK'))>0 then '√'衡腔 else '' end) 主鍵,b.name 類型,a.length 佔用位元組數,
11 COLUMNPROPERTY(a.id,a.name,'PRECISION') as 長度,
12 isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小數團族位數,(case when a.isnullable=1 then '√'else '' end) 允許空,
13 isnull(e.text,'') 默認值,isnull(g.[value], ' ') AS [說明]
14 FROM syscolumns a
15 left join systypes b on a.xtype=b.xusertype
16 inner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties'
17 left join syscomments e on a.cdefault=e.id
18 left join sys.extended_properties g on a.id=g.major_id AND a.colid=g.minor_id
19 left join sys.extended_properties f on d.id=f.class and f.minor_id=0
20 where b.name is not null
21 --WHERE d.name='要查詢的表' --如果只查詢指定表,加上此條塌攔弊件
22 order by a.id,a.colorder

⑦ sql條件查詢 ,三個欄位滿足一個就行,

select
*
from
[表名]
where
[字仿檔物段名]
in
('褲子','鞋')
就是這個
*代表查詢所有的內容,如果你只要查詢產品型號的話就把*改備液成欄位名蠢弊產品弄號。

⑧ sql條件查詢 ,三個欄位滿足一個就行,

select * from table where date1=5 or date2=5 or date2=5條件之間跡答或用 or 關鍵顫州孫茄鏈字關聯 和 用and關鍵字

⑨ SQL查詢3個欄位值相同的數據

對b,c,d做分組統計,找到COUNT>1的即可

selectb,c,d,count(1)fromtableNamegroupbyb,c,d
havingcount(1)>1

⑩ sql語句怎麼查詢三個數值欄位的綜合,比如英語yy,數學sx,語文yw成績。怎麼查詢它們的總和

select (yy+sx+yw) as 總和 from 表名
查詢某列的總和用sum
select sum(yy) from 表名