have count (*) > 1)and rowID not in (select min (rowid) from Vitae GROUP by PEOPLEID,SEQ have Count (*) >1) 5. Find redundant duplicate records (multiple fields) in the table, not including the smallest ROWID recordsSELECT * FROM Vitae awhere (A.PEOPLEID,A.SEQ) in (select Peopleid,seq from Vitae GROUP by PEOPLEID,SEQ have COUNT (*) > 1)and rowID not in (select min (rowid) from Vitae GROUP by PEOPLEID,SEQ have Count (*) >1) 6. Delete duplicate data 1, the smallest ID in the duplicate data is fou
Tags: des style blog color io using strong data divID refers to the current data tb_id parameterMethod One:String Presql="Select Top 1 * from Table wheretb_id"+Id+"Order bytb_idDESC"String Nextsql="Select Top 1 * from Table wheretb_id>"+Id+"Order bytb_idASC"Method Two:String Presql="Select * from [Table] wheretb_id=(Select MAX(tb_id) from [Table] wheretb_id"+Id+" )"; string Nextsql="Select * from [Table] wheretb_id=(Select MIN(tb_id) from [Table] wheretb_id>"+Id+")";Union the
select订单编号,DENSE_RANK()over(orderby 订单编号)fromtestSort Result:55678-0-1 155678-0-1 133454-0-1 233454-0-1 233454-0-1 2This is according to the order of different order in the back row, of course, you can also add to the end of the example you want to start number: DENSE_RANK()over( order by订单编号)+30 那么行号结果是31和32Normal sort:Select order number, Row_number () over (PARTITION by order number order by order number) from test55678-0-1 155678-0-1 233454-0-1 333454-0-1 433454-0-1 5This is the same as the
Select Sql_calc_found_rows * FROM (SELECT * To oses_vehdata201606 UNION ALL SELECT * from oses_vehdata201605) T wher e 1=1 and t.check_time between ' 2016-06-23 00:00:00 ' and ' 2016-06-23 23:59:59 ' ORDER BY check_time DescResults: 45.66 S, 36.5sSelect Sql_calc_found_rows * FROM (SELECT * from oses_vehdata201606) t where 1=1 and t.check_time between ' 2016-06-23 00 : 00:00 ' and ' 2016-06-23 23:59:59 ' ORDER BY check_time DescResults: 8s, 9sSelect Sql_calc_found_rows * FROM (SELECT * from oses_
I saw a post on the Forum ,《How can I query records of consecutive dates?, As follows:
Insus. NET tries to write a program and tests it to get the expected results. The SQL code can be used for reference and learning.Copy codeThe Code is as follows:-- Create a temporary table to store records of consecutive datesCreate table # temp (idd varchar (10), sdate datetime)DECLARE @ sD DATETIME -- start dateDECLARE @ eD DATETIME -- end date-- In the
Usage of selectByExample () in Mybatis: Use userID to query the record list.
Public class ViewTeam {@ Autowiredprivate TeammemberMapper teammemberMpper; @ Testpublic void test () {Integer idInteger = 3; TeammemberExample teammemberExample = new TeammemberExample (); Criteria criteria = teammemberExample. createCriteria (); criteria. andUserIdEqualTo (idInteger); List
For example, select nbsp; name nbsp; from nbsp; user nbsp; where nbsp; id nbsp ;= nbsp; 1. how to obtain the value nbsp; name nbsp; what should I do? PHP PDO query how to return a single-pick record
For example, select name from user where id = 1
How can I obtain the value of name? Only one piece of data is shared:
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Such as
Dump ($find) can print out all the results of the query, but using the following while statement is printed by one by one, and nothing is shown, what is going on.
Reply to discussion (solution)
foreach ($find as $row) {Var_dump ($row);}How about this?
1)Connection Database omitted ...$sql = "SELECT * from type where PID = 0 and type=". $type$result = mysql_query ($sql);while ($row = Mysql_fetch_array ($result)) {Print_r ($row);}2)$find
|+----+-------+---------+3 rows in Set (0.02 sec) This produces multiple records, such as 33 being found, but MySQL can also use regular, very interesting find_in_set () The position returned by the function and returns 0 if it does not exist.mysql> SELECT find_in_set (' e ', ' h,e,l,l,o '); +------------------------------+| Find_in_set (' e ', ' h,e,l,l,o ') |+------------------------------+| 2 |+------------------------------+1 row in Set (0.00 sec) can also be used
ASP tutorial query Specify ID record to modifyDim Id,sql,urlId=html_encode (Request.QueryString ("id"))If id= "" ThenResponse.Write ("The data transfer process has been modified, the server rejects the operation.")Response.EndElseIf not IsNumeric (Id) ThenResponse.Write ("The data transfer process has been modified, the server rejects the operation.")Response.EndElseCall Hit (ID)Url=request.servervariables
Label:1 go to re-querySelect DISTINCT ID from User_info where xxxxxx2 sorting in GROUP by grouping queriesThe group by itself does not have a sort function, which is probably not the perfect place for MySQL, but we can do thatSelect attack_id, Time from (SELECT * from Attack_log where (time+172800) * Note: first by sorting rows into a set, and then to change the collection to check, so that the grouping to achieve a sort of query3 Finding the top two data that meets your requirementsSelect Attac
(day,tr.jtdate, ' 2016-07-12 ') GROUP by Zuoxi) X3 on X1.zuoxi1=x3.zuoxi3 left JOIN (--Total investment amountSELECT Tr.zuoxi as Zuoxi4,sum (amount) as Bidamount from Yyd_borrow_bidrecord m INNER joins Yyd_users_userinfo u on M.bid_us Er_id=u.id right JOIN [Hur_telcallrecord] tr on U.phone=tr.phoneWHERE M.status=1 and CONVERT (VARCHAR (), createtime,120) = ' 2016-07-12 'and borrow_id in (select borrow_id from Yyd_borrow_borrowinfo_ext as ext where ext.borrow_productDATEDIFF (day,tr.jtdate, ' 20
|+----+-------+---------+3 rows in Set (0.02 sec) This produces multiple records, such as 33 being found, but MySQL can also use regular, very interesting find_in_set () The position returned by the function and returns 0MYSQL if it does not exist> SELECT find_in_set (' e ', ' h,e,l,l,o '); +------------------------------+| Find_in_set (' e ', ' h,e,l,l,o ') |+------------------------------+| 2 |+------------------------------+1 row in Set (0.00 sec) can also be used
Recently on the Internet to find the next MySQL query random several sql, I put the final record down.SELECT * from Uchome_mtag as a joins (SELECT MAX (TAGID) as ID from Uchome_mtag) as BOn (A.tagid>=floor (B.id*rand ())) LIMIT 50I found a problem after the experiment, when the total number of your table and the number of bars you want to get close, it may not be ideal, it is possible that you have 10, you
1, configuration onLinux:Added in MySQL config file my.cnfLog-slow-queries=/var/lib/mysql/slowquery.log (Specify the log file location, can be empty, the system will give a default file Host_name-slow.log)long_query_time=2 (record over time, default is 10s)Log-queries-not-using-indexes (log down without using the indexed query, depending on the situation to decide whether to open)Log-long-format (if set, al
);--degree between 80 in the degree column, taking the student information between 60 and 80 grades,
Select * fromStudent TwhereT.snoinch(SelectE.sno fromScore EwhereDegreeinch( -, the, the));--degree in (85,86,88) score 85,86,88 in degree student information--in () sub-query
--Fuzzy Query
Select * fromSTUDENT TwhereSname like 'Wang%';--Query Student table fo
Label:SELECT * from aa01_2014 where aaa001= (select C.P from (select Aaa001,lag (aaa001,1,0) over (order by aaa001) as p from aa0 1_2014) c where c.aaa001= ' 8a9299ec522f54f401522f81eedc0007 ');SELECT * from aa01_2014 where aaa001= (select C.N from (select Aaa001,lead (aaa001,1,0) over (order by aaa001) as N from AA 01_2014) c where c.aaa001= ' 8a9299ec522f54f401522f81eedc0007 ');Oracle can use the lead, lag function to query the next, previous
Mysql
in the MySQL , how to implement Top N and M to N section of the record query?
We can do this by taking advantage of a clause--limit--in MySQL that is supported by SELECT.
Limit can implement top N query, also can implement M to n( a paragraph) of the record
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