Mysql limit records depending on size output -


I am thinking that it is possible to limit the number of records because the output of a query based on size (KB) In particular the output of my database, there is a table in which a long description can occur. For example, LIMIT 0,15 for example, fifteen records can have a bigger description or simple one, but I would like to get a certain amount of data (automatically increase or decrease the number of records) Is there any other instructions for limiting?

Another option is getting the number of characters, summarize them, set a boundary and join the original query. But I think that this is not the best way.

You do this by keeping track of length In a variable and then stopping when some threshold is crossed: Choose descr. from 

  Select descr, @ size: = size @ size (descr) of the table size As the length (descr) size: = 0) in the form of T) where the size & lt; = 100000;

Your definition of length of each record can be more sophisticated, but it should give you this idea.


Comments

Post a Comment

Popular posts from this blog

ios - How do I use CFArrayRef in Swift? -

I am using Objective-class in my Swift Project through a bridging header. The method signature looks like this: - Some cement (some type) some parameters; I started by getting an example of class, calling method, and storing the value: var myInstance = MyClassWithThatMethod (); Var cfArr = myInstance.someMethod (some value); Then try to get the value in the array: var valueInArrayThatIWant = CFArrayGetValueAtIndex (cfArr, 0); However, I get the error unmanaged & lt; Cfarray & gt; Not like 'CFArray' . Unmanaged & lt; Cfarray & gt; also means? I looked, but I do not need to change the array in a fast array (though it would be good). I need to be able to get value from the array. I also tried CFArray method to pass in a function: func doSomeStuffOnArray (myArray: NSArray) {} Although I get the same error when using: doSomeStuffOnArray (cfArr); // unmanaged & lt; CFArray & gt; I am using CFArray because I want to sto...
Read more

eclipse plugin - Run java code error: Workspace is closed -

To create an automated project, I created a plug-in project with the following dependencies: Org.eclipse.core.resources org.eclipse.equinox.registry org.eclipse.core.runtime and the following The Java class is located in the src folder: Package Examiner; Import org.eclipse.core.resources.IProject; Import org.eclipse.core.resources.IWorkspaceRoot; Import org.eclipse.core.resources.ResourcesPlugin; Import org.eclipse.core.runtime.CoreException; Import org.eclipse.core.runtime.IProgressMonitor; Import org.eclipse.core.runtime.NullProgressMonitor; Public class tes {public static zero main (string [] args) {// TODO auto generated method stub IProgressMonitor progress monitor = new NullProgressMonitor (); IWorkspaceRoot root = ResourcesPlugin.getWorkspace (). GetRoot (); Ipoject project = root.jetproject ("desired projectname"); Try {Project.create (progress monitor); Project.open (progressMonitor); } Grip (CoreException E) {// TODO Auto generated blocking block e....
Read more

c - Error on building source code in VC 6 -

When I create my project in VC6, the BScMKE reports the following error Linking .. Creating Library ... .. / ... / PB / Bean / Debub / ICEERP.Lib and Object ........ P.B. / Bean / DBube / ICREPlay.APP Browse information file ... BSMMK: ​​error can not be read from BK 1505: file '../../PB/bin/TmpOut/ICReplay/Debug/ICReplay_PB.bsc' Error executing bscmake.exe Can someone help me? 2 Reason for reference from: "ICReplay_PB .bsc "file will be corrupted The trunk of the file will be happening with the compiler running out of disk space or is being interrupted when creating .sbr file I think this answer will help you!
Read more