logo
down
shadow

SQL max concurrent sessions per hour of day


SQL max concurrent sessions per hour of day

By : user2952632
Date : November 19 2020, 01:01 AM
Hope this helps UPDATED (v # 4):
I've added date filter at the end of the query - WHERE A.[Date] Between @X and @Y - it's not most efficient way in this case but simplest I think and less error prone for a start :
code :
SELECT
  A.[Date],
  A.[Hour],
  SUM(CASE WHEN (B.[SessionID] IS NULL) THEN 0 ELSE 1 END) AS [Number_of_Sessions_Per_Hour]
FROM
(
    SELECT DISTINCT
        CONVERT(DATETIME,
            LTRIM(RTRIM(CONVERT(NVARCHAR(10), YEAR(userlog.[Date]))))
            + '-' + RIGHT('0' + LTRIM(RTRIM(CONVERT(NVARCHAR(10), MONTH(userlog.[Date])))), 2)
            + '-' + RIGHT('0' + LTRIM(RTRIM(CONVERT(NVARCHAR(10), DAY(userlog.[Date])))), 2)
            , 120) AS [Date],
        hours_table.[Hour]
    FROM
        userlog,
        (
            SELECT 1 AS [Hour] UNION ALL SELECT 3 AS [Hour] UNION ALL SELECT 4 AS [Hour] UNION ALL SELECT 5 AS [Hour] UNION ALL SELECT 6 AS [Hour]
             UNION ALL SELECT 7 AS [Hour] UNION ALL SELECT 7 AS [Hour] UNION ALL SELECT 8 AS [Hour] UNION ALL SELECT 9 AS [Hour] UNION ALL SELECT 10 AS [Hour]
             UNION ALL SELECT 11 AS [Hour] UNION ALL SELECT 12 AS [Hour] UNION ALL SELECT 13 AS [Hour] UNION ALL SELECT 14 AS [Hour] UNION ALL SELECT 15 AS [Hour]
             UNION ALL SELECT 16 AS [Hour] UNION ALL SELECT 17 AS [Hour] UNION ALL SELECT 18 AS [Hour] UNION ALL SELECT 19 AS [Hour] UNION ALL SELECT 20 AS [Hour]
             UNION ALL SELECT 21 AS [Hour] UNION ALL SELECT 22 AS [Hour] UNION ALL SELECT 23 AS [Hour] UNION ALL SELECT 24 AS [Hour] 
        ) as hours_table
) AS A
LEFT OUTER JOIN
(
    SELECT 
        userlog.SessionID,
        MAX(CASE WHEN userlog.LogType = 'LOGON' 
                 THEN CONVERT(DATETIME,
                        LTRIM(RTRIM(CONVERT(NVARCHAR(10), YEAR(userlog.[Date]))))
                        + '-' + RIGHT('0' + LTRIM(RTRIM(CONVERT(NVARCHAR(10), MONTH(userlog.[Date])))), 2)
                        + '-' + RIGHT('0' + LTRIM(RTRIM(CONVERT(NVARCHAR(10), DAY(userlog.[Date])))), 2)
                        , 120)
                 ELSE CONVERT(DATETIME, '1900-01-01', 120)
            END) AS [Date_Session_START],
        MAX(CASE WHEN userlog.LogType = 'LOGOFF' 
                 THEN CONVERT(DATETIME,
                        LTRIM(RTRIM(CONVERT(NVARCHAR(10), YEAR(userlog.[Date]))))
                        + '-' + RIGHT('0' + LTRIM(RTRIM(CONVERT(NVARCHAR(10), MONTH(userlog.[Date])))), 2)
                        + '-' + RIGHT('0' + LTRIM(RTRIM(CONVERT(NVARCHAR(10), DAY(userlog.[Date])))), 2)
                        , 120)
                 ELSE CONVERT(DATETIME, '1900-01-01', 120)
            END) AS [Date_Session_END],
        MAX(CASE WHEN userlog.LogType = 'LOGON' THEN DATEPART(HOUR, userlog.[Date]) ELSE 0 END) AS [Hour_Session_START],
        MAX(CASE WHEN userlog.LogType = 'LOGOFF' THEN DATEPART(HOUR, userlog.[Date]) ELSE 0 END) AS [Hour_Session_END],
    FROM
        userlog
    GROUP BY
        userlog.SessionID
) AS B
    ON (A.[Date] >= B.[Date_Session_START] AND A.[Date] <= B.[Date_Session_END])
        AND (A.[Hour] >= B.[Hour_Session_START] AND A.[Hour] <= B.[Hour_Session_END])
WHERE
    A.[Date] Between @X and @Y
GROUP BY
  A.[Date],
  A.[Hour]


Share : facebook icon twitter icon
How to communicate between concurrent sessions in PHP ans JS?

How to communicate between concurrent sessions in PHP ans JS?


By : Rakesh Subramanian
Date : March 29 2020, 07:55 AM
this will help This is how I solved it:
Client A leaves an open ajax call: $.ajax(...).done(function myCallBack(){...});: on the PHP server side (session), A locks on a semaphore using sem_acquire($semaphore_A), and waits.
Concurrent SMTP sessions with ASP.NET

Concurrent SMTP sessions with ASP.NET


By : 古韋曜
Date : March 29 2020, 07:55 AM
I wish did fix the issue. That's a good approach, but you don't want to have too many concurrent SMTP sessions, for several reasons :
You will exhaust your system resources if you create tens or hundreds of threads through SmtpClient.SendAsync(). The MSDN documentation for SendAsync doesn't state explicitly that one thread is created per call, but it tells that you can't call SendAsync until the previous call is completed. This sounds like the class spawns its own thread :
Concurrent User Sessions - Why Don't We See More Of It?

Concurrent User Sessions - Why Don't We See More Of It?


By : tanadeau
Date : March 29 2020, 07:55 AM
I wish this helpful for you I think this is something that should be implemented by browsers by allowing multiple sessions, each using their own cookie/authentication/etc.
That would probably be the best solution, as it would seem to work for all sites, and require no updating for them, and, although I don't know much about it, it doesn't seem it would be terribly difficult to implement either.
Can Intraweb Run More that 65,536 concurrent sessions?

Can Intraweb Run More that 65,536 concurrent sessions?


By : Dolphin
Date : March 29 2020, 07:55 AM
will be helpful for those in need IntraWeb is just not designed for handling such session amounts. IntraWeb is designed for Web applications and not for Web sites. Eventhough a plain IntraWeb session takes only a few kbytes, IntraWeb's session handling model is more a "fat" model. It is perfectly suited for creating complex stateful applications that can handle a few hundred concurrent sessions.
For Web sites with thousands of users per day - where many users just open one page and go away again - you /could/ certainly use Webbroker - but that basically means that you have to build up everything from scratch.
Neo4j count max concurrent sessions

Neo4j count max concurrent sessions


By : Jagadesan Chandra Mo
Date : March 29 2020, 07:55 AM
it fixes the issue This should work, you need a kind of window function which we can simulate by aggregating the distinct start-times to get our slots.
And then for each of the start-times filter all sessions to the ones that are running during that time.
Related Posts Related Posts :
  • How to do a complex calculation as this sample
  • Passing a ResultSet into a Postgresql Function
  • Netsuite custom formula field using a CASE statement with multiple WHEN conditions returning "invalid expression&qu
  • Execute query command (dynamic sql) runs faster than ordinary query
  • How to extract only numbered rows from a column
  • INSTEAD OF DELETE trigger (Postgresql)
  • Oracle Apex, when a report with sql is created, how do i get it return after entering in to a text box?
  • Select records based on two tables where one column in one table starts with the records from another tables column usin
  • How to write select using two ids combination in Oracle 11g
  • Frequently use of 'UPDATE STATISTICS WITH FULLSCAN' is normal?
  • need query for this simple pulling data sql server
  • Sql query by using decode to show grades of employee
  • Not a single function error in Oracle
  • Oracle SQL optimizer's behavior when dealing with ORs and row-independent predicates (such as functions returning same v
  • Combining output of two or more select statement
  • Must Declare Scalar Variable Exception
  • Postgres Calculate Difference Using Window Functions
  • SQL Server : unsure how to retrieve selected records
  • SQL unique field: concurrency bugs?
  • Query to get the next identity?
  • SQL Server Adding summing values based on the month
  • Join on month if available else join on latest month
  • How to solve error: ORA-01406 fetched column value was truncated?
  • Selecting Field Multiple Times using OR
  • Which SQL datatype can be used to store mobile numbers in numeric forms, without including characters like brackets and
  • Oracle SQL - "Not a group by expression" after adding CASE statements
  • Runnning total of unique string values in column over days
  • VB.Net to AccessDB by SQL - INSERT INTO with parameters error
  • SQL/Excel/VBA - UPDATE query: 'Syntax Error (missing operator) in query expression'
  • Code to combine two sql queries
  • Setting SQL Date field value based off Week Number and Day Number Field
  • SQL query to find matching records but with differences in case sensitivity?
  • How to sort record inside views in SQL Server 2008
  • How to link the output of teradata sql query to an excel sheet?
  • Matching sets in SQL when cross-referencing
  • error even after following Microsoft format in SQL
  • Increase price by percentage, results rounded
  • Can we Use "Case" in a ColdFusion Query-of-Query
  • displaying 'Active' for a row which has 'A' as value
  • Using pattern search in SQL Server Query
  • SQL - how to group transactions for a certain date pattern?
  • How to Index SQL with multiple AND conditions nested inside OR
  • SQL rank with priority
  • Does BigQuery support SubQueries?
  • Any ideas for persisting H2 Database In-Memory mode transaction?
  • How to improve SQL query performance (correlated subqueries)?
  • Filter repeated columns in Oracle
  • SQL Server join on whichever column has value populated
  • use sql stored procedure to insert data which is returned from a query stored in a table
  • Query not working1
  • SQL - using an alias in a where clause in a subquery
  • How to search for a whole word with special char using oracle contains?
  • Production Perfomance of using SELECT * statements?
  • String concatenation not working as expected in SELECT statement
  • How to detect which stored procedures UPDATE or INSERT into a certain TABLE?
  • Select statement inside CASE - SQL
  • .Net Float error 4 - float(4) = 4.44089209850063E-16
  • How to show as column to recursive rows in a table With SQL Server
  • SQL Server error: Column name or number of supplied values does not match table definition
  • How to find a table name which's column name consist cl_
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org