spot7.org logo
Home PHP C# C++ Android Java Javascript Python IOS SQL HTML Categories

Finding the Max of another Max query


Maybe this helps:

SELECT t.client,
       t.item,
       MAX(t.serial) AS serial
  FROM(SELECT client,
              MAX(item) AS item
         FROM your_table
        GROUP
           BY client
      ) a
  JOIN your_table t
    ON a.client = t.client AND a.item = t.item
 GROUP
    BY t.client, t.item 

If your DBMS supports window functions, another way would be:

SELECT client, item, serial
  FROM(SELECT client, item, serial,
              ROW_NUMBER() OVER (PARTITION BY
client ORDER BY item DESC, serial DESC) rn
         FROM your_table
      )
 WHERE rn = 1

Categories : SQL

Related to : Finding the Max of another Max query
Finding a room through it's name
You can't access a room if you have no objects inside it. It is like the fog of war. In order to see what is inside a room (in other words, to get access to the room object instance) you have to send some of your creeps there. UPDATE: Game.rooms property has been added to the API.

Categories : Misc
Query Builder or Closure or DQL, which is the right one for get ride of this complex SQL query with ManyToMany relationship?
When you create a ManyToMany relationship in your entity, Doctrine will generate the third table as mediator between those two entities (named in @ORMJoinTable) with two fields (defined in joinColumns). You do not have direct access to the fields or columns in the third table but they all will be handled by Doctrine in your DQL. This means in your DQL you need to just set the joint table id in you

Categories : Symfony2
Query in java code is returning null values but its working fine on ODBC query tool
Hm, my solution of problem: while (rs.next()) { System.out.println(IOUtils.toString(rs.getCharacterStream("field2"))); } p.s. IOUtils - class from Apache Commons IO p.s.s. .getBytes() - return me only 255 symbols (there is were more symbols, so i used Reader)

Categories : Java
Finding the sign of a Lua number, from C
One possible solution is to let Lua do the comparison for you. This can be done using lua_compare (or lua_lessthan, for LuaJIT and Lua 5.1): #if LUA_VERSION_NUM == 501 #define LUA_LESS_THAN(state, index1, index2) lua_lessthan(state, index1, index2) #elif LUA_VERSION_NUM > 501 #define LUA_LESS_THAN(state, index1, index2) lua_compare(state, index1, index2, LUA_OPLT) #endif lua_pushnumber(L,

Categories : C
Boost not finding file
Is fname a path? Because, then, just drop the .c_str() member invocation. It might be that the accessor functions add some Operating System Specific quoting or escaping. (example on linux) You might assign to a std::string so you can observe the value in a debugger.

Categories : C++
Recently Add
SQL to COUNT items associated with individuals
sqlite in syntax, by column
Get DISTINCT Sum of Total by WorkID with LEFT JOINs
Create a trigger dealing with two tables
SQL: Combinations by Type
T-SQL Procedure split and join on sub columns
GROUP BY in Informix (11.5)
Returning duplicates based on one value in SQL
Joins over non-key attributes
MS-Access SELECT TOP N subquery SQL
Rails PG::UndefinedTable: ERROR: missing FROM-clause entry for table
Case-insensitive primary key of type nvarchar where ß != ss
Get min and max value from a multiple rows events
JPA/Hibernate: on delete set null
How do i structure a query where I am INSERTing into a new table and need to increment a column every time?
sql query to groupby with a deduplicated column
Oracle left-outer-join syntax shorthand notation (+) available in HQL?
Selecting numbers into array and then looping over them
Update query to fix incorrect references between two tables
Merging query records into one
How to select duplicate columns data from table
Confused syntax in Where clause
SQL Server 2005 GROUP BY and COUNT query for each month
error in sql query result
Can IIS and SQL run on the same Azure Virtual Machine?
SQL query to find all names where same user_id count > 3
SQL return a default value if a row is not found [PostgreSQL]
Schema Design for Invoices and Transaction - "mystery" relation
sql create table same primary & foreign key
Adding FK constraint WITH CHECK (SQL Server)
© Copyright 2017 spot7.org Publishing Limited. All rights reserved.