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  • Update Left Join

    2019-10-05 17:16:45
    SQL的UPDATE联查更新语句,开始想都没想就要这样做,然后语法出了上网查了下,还真有,以前没这样试过,记录一下方便回忆 Update a set a.Manage_...Left join Manage_ButtonBar b on a.Manage_PageUrlID=b.Ma...

    SQL的UPDATE联查更新语句,开始想都没想就要这样做,然后语法出了上网查了下,还真有,以前没这样试过,记录一下方便回忆

    Update a set a.Manage_FunctID=b.Manage_FunctID
    
    From Manage_PageUrl a
    
    Left join Manage_ButtonBar b on a.Manage_PageUrlID=b.Manage_PageUrlID
    
    Left join Manage_Funct c on b.Manage_FunctID=c.Manage_FunctID
    

      

    转载于:https://www.cnblogs.com/21xz/archive/2011/09/21/2183066.html

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  • MYSQL LEFT JOIN ...UPDATE HO_User_Soho_Team A LEFT JOIN HO_User_Soho_VIP_Team B ON A.`TeamID` = B.`TeamID` SET A.`TeamState` = '0' WHERE B.`UserID`= "+userID   DELETE:DELETE A FROM [SH...

    MYSQL LEFT JOIN

     

    UPDATE:

     

    UPDATE HO_User_Soho_Team A LEFT JOIN HO_User_Soho_VIP_Team B ON A.`TeamID` = B.`TeamID` SET A.`TeamState` = '0' WHERE B.`UserID`= "+userID

     

    DELETE:
    DELETE A FROM [SH_ClosingBalance] A LEFT JOIN [SH_StoreHouse] B ON A.StoreHouseID=B.ID
    WHERE B.departmentID='1000'

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  • (1)Left join 更新update a set a.name=b.name from a left join b on a.id=b.stuid(2)ROW_NUMBERselect ROW_NUMBER() over(partition by name order by score) as rows,id,score, id from student partition b...

    (1)Left join 更新
    update a set a.name=b.name from a left join b on a.id=b.stuid
    (2)ROW_NUMBER
    select ROW_NUMBER() over(partition by name order by score) as rows,id,score, id from student


    partition  by关键字是分析性函数的一部分,它和聚合函数(如group by)不同的地方在于它能返回一个分组中的多条记录,而聚合函数一般只有一条反映统计值的记录,

    partition  by用于给结果集分组,如果没有指定那么它把整个结果集作为一个分组。

    partition by 与group by不同之处在于前者返回的是分组里的每一条数据,并且可以对分组数据进行排序操作。后者只能返回聚合之后的组的数据统计值的记录。

    转载于:https://www.cnblogs.com/zhaogaojian/p/9177766.html

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  • 1. INNER JOIN select * from A select * from B --select A.Name,A.City,B.km from A,B where A.pid=B.pid SELECT A.Name,A.City,B.km FROM A INNER JOIN B ON A.pid = B.pid ...2. LEFT JOIN sel


    1. INNER JOIN

    select * from A
    select * from B
    --select A.Name,A.City,B.km from A,B where A.pid=B.pid
    SELECT A.Name,A.City,B.km FROM A INNER JOIN B ON A.pid = B.pid



    2. LEFT JOIN  

    select * from A
    select * from B
    SELECT A.Name,A.City,B.km FROM A LEFT JOIN B ON A.pid = B.pid   
    --left join(左联接) 返回包括左表中的所有记录和右表中联结字段相等的记录 


    3. right join

    select * from A
    select * from B 
    SELECT A.Name,A.City,B.km FROM A RIGHT JOIN B ON A.pid = B.pid  
    --right join(右联接) 返回包括右表中的所有记录和左表中联结字段相等的记录



    4. FULL JOIN

    select * from A
    select * from B 
    SELECT A.Name,A.City,B.km FROM A FULL JOIN B ON A.pid = B.pid   
    --只要其中一个表中存在匹配,就返回行


    5.Update inner join, Delete inner join

    update tb_User
    set pass=''
    from tb_User usr
    inner join tb_Address addr on usr.nAddressFK = addr.nAddressID
    where usr.id=123

    update的格式是

    update t1 set t1.name=’Liu’ from t1 inner join t2 on t1.id = t2.tid

    delete 语句也是类似

    delete from t1 from t1 inner join t2 on t1.id = t2.tid

    注意蓝色部分。


    6.on And

    连表查询加个限制, name like '%黎%' (左表a name like '%黎%' ,显示左表满足条件和不满足条件的记录,只是左表不满足条件的右表对应的记录是null)

    数据:

    结果:

    select * from T1 a

             left join T2 b 

             on a.id=b.id and a.name like '%黎%'


    7.on where 

    临时表生成好后,再对临时表进行过滤的条件。

    select * from T1 a
             left join T2 b on a.id=b.id 
                                    where a.name like '%黎%'




    展开全文
  • oracle update left join

    千次阅读 2018-08-08 15:29:09
    oracle update left join 写法 (修改某列,条件字段在关联表中) 案例: E:考核表 X,:用户表 USERNAME 关联 需求:修改营业部最高分 分析:通过登录账号的营业部ORG_ID 更新E表,E表中无ORG_ID 字段,X表中可以...
  • mysql update left join

    2017-08-22 11:03:51
    先验证 select u.md5,u.id as uid,a.id as aid,u.dlcount ...left join zb_article partition(p0, p2017) a on u.md5=a.url_md5 where u.dlcount > 0 and a.id is null 再执行update zb_url a left join zb_ar
  • 在使用update语句的时候我们有时候需要利用left join关联表,以下是正确操作:效果,让指定的order表id为1,2,3数据的finish_at字段更新为freports表的created_at字段UPDATEordersLEFTJOINfreportsONfreports.order...
  • sql update left join

    2017-12-27 15:24:25
    UPDATE b SET b.Address = a.ADDRESS , b.lot = a.lot , b.lat = a.lat FROM VisitPharmacy_StoreLocation a LEFT JOIN Pharmacy b ON a.PharmacyID = b.PharmacyID
  • 【STM32F4】读取芯片ID和芯片Flash Size首先声明,手册上给出的FlashSize地址是错误的,正确的应该是0x1FFF7A20,取高16位.确切说应该是(0x1FFF7A23,0x1FFF7A22两个字节), 芯片的这96位ID是产品唯一身 ...bzoj3747经典...
  • 联表修改: updateleft join b on a.bid = b.id set a.status= '0' where b.id is null  联表删除: delete a from a left join b on a.bid = b.id where b.id is null 
  • SQL update left join查询

    2020-08-01 20:12:41
    对于有的更新语句,要更新的表可能条件不够,需要用到left join关联其他表, 但是不能直接关联,否则报错:错误如下: update imim_gireqbillitems gi left join imim_gireqbills g on g.guid=gi.guid set gi....
  • oracle update left join查询

    千次阅读 2018-11-16 23:23:23
    对于有的更新语句,要更新的表可能条件不够,需要用到left join关联其他表, 但是不能直接关联,否则报错:错误如下: update imim_gireqbillitems gi left join imim_gireqbills g on g.guid=gi.guid set gi....
  • update delete left join

    2008-07-16 09:54:00
    UPDATE 和DELETE的 LEFT JOINUPDATEUPDATE A SET ApproverID=NULL,ApproveDate=NULL,ApproveResult=100,CheckerID=null, CheckDate=null, IsCheck=0 FROM [SH_MaterialApplyBuyBill] A LEFT JOIN [SH_
  • oracle update left join 写法

    千次阅读 2019-06-19 18:40:00
    oracle update left join 写法 (修改某列,条件字段在关联表中) 案例: E:考核表 X,:用户表 USERNAME 关联 需求:修改营业部最高分 分析:通过登录账号的营业部ORG_ID 更新E表,E表中无ORG_ID 字段,X表中可以关联....
  • 单张表自联: UPDATE umbase_disposalstandards t1 left join umbase_disposalstandards t2 on t2.id = t1.id SET t1.timeoutScore = t2.score

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