Define/declare dates and use in CTE

Hi all

I can't seem to find a solution to my problem, so now I try my luck here

Basically, I want to define a Start_date and an End_date which I can then use a CTE query like this:

WITH OPL
AS (
Select *
FROM TBL_OPLAG
WHERE NR = '11'
     AND OPL_DATE BETWEEN start_date AND end_date

,REK
AS (
SELECT *
FROM REK
WHERE NR = '12'
    AND REK_DATE BETWEEN start_date AND end_date

SELECT *
FROM OPL
JOIN REK ON OPL.OPL_DATE = REK.REK_DATE

So my question is, how can we make this work?

Thanks in advance!

I have now found a solution for this.

Solution can be found in this thread:

http://www.orafaq.com/Forum/t/199494/

Tags: Database

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Incase others are reading this in the future and ask yourself how: my conclusion is that the best way to define metadata such as:

-Photo rating

-Tags

-Description

... does NOT use EXIF. On the contrary, it seems that XMP is a much better choice:

http://en.Wikipedia.org/wiki/Extensible_Metadata_Platform

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Here's the code I added bo my main.cpp:

//-----------------------------------------------------------------------------
// XMP
//-----------------------------------------------------------------------------

// Must be defined to instantiate template classes
#define TXMP_STRING_TYPE std::string

// Must be defined to give access to XMPFiles
#define XMP_INCLUDE_XMPFILES 1

#define UNIX_ENV 1

#include "xmp/XMP.incl_cpp"
#include "xmp/XMP.hpp"

#include 
#include 

using namespace std;

//-----------------------------------------------------------------------------

... and here's what I added to the .h file that I wanted to use XMP in: (it does not include the XMP.incl_cpp at the top of the notice)

//-----------------------------------------------------------------------------
// XMP
//-----------------------------------------------------------------------------

#define TXMP_STRING_TYPE std::string
#define XMP_INCLUDE_XMPFILES 1
#define UNIX_ENV 1

#include "xmp/XMP.hpp"

#include 
#include 

using namespace std;

//-----------------------------------------------------------------------------

And finally, here's a big copy and paste part of the key code that I adapted to the code example in the XMP SDK I downloaded separately for read/write some common tags. Feel free to use this code in your own applications, or to adapt it, if that's helpful.

int ImageViewContainer::xmpWrite()
{
    qDebug() << "xmpWrite()";

    string filename = file.toStdString();

    if (!SXMPMeta::Initialize())
    {
        qDebug() << "XMP: An error occurred initializing XMP.";
        return -1;
    }

    XMP_OptionBits options = 0;

    #if UNIX_ENV
        options |= kXMPFiles_ServerMode;
    #endif

    if (!SXMPFiles::Initialize(options))
    {
        qDebug() << "XMP: An error occurred initializing SXMPFiles.";
        return -1;
    }

    try
    {
        // Try using the smart handler.
        XMP_OptionBits opts = kXMPFiles_OpenForUpdate | kXMPFiles_OpenUseSmartHandler;

        bool ok;
        SXMPFiles myFile;

        // Open the file.
        ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
        if (!ok)
        {
            qDebug() << "XMP: No smart handler available for " + file + ". Trying packet scanning.";

            // Now try using packet scanning.
            opts = kXMPFiles_OpenForUpdate | kXMPFiles_OpenUsePacketScanning;
            ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
        }

        // If the file is open then read the metadata.
        if (ok)
        {
            qDebug() << "XMP: Opened: " << file;

            // Create the xmp object and get the xmp data.
            SXMPMeta meta;
            myFile.GetXMP(&meta);

            // Should we be doing this?
            meta.SetProperty(kXMP_NS_XMP, "CreatorTool", "Updated by PhotoStar", 0);

            int ratingToSet = rating;
            if (ratingToSet == -1) { ratingToSet = 0; }
            meta.SetProperty(kXMP_NS_XMP, "Rating", QString::number(ratingToSet).toStdString(), 0);

            // Required before we can call other functions that refer to this namespace
            // without getting an exception.
            std::string tmp;
            meta.RegisterNamespace("http://ns.microsoft.com/photo/1.0/", "MicrosoftPhoto", &tmp);

            if (ratingToSet == -1)
            {
                meta.DeleteProperty("http://ns.microsoft.com/photo/1.0/", "Rating");
            }
            else
            {
                int microsoftRating;

                // Mapping:
                // xmp:Rating=1 -> MicrosoftPhoto:Rating=1
                // xmp:Rating=2 -> MicrosoftPhoto:Rating=25
                // xmp:Rating=3 -> MicrosoftPhoto:Rating=50
                // xmp:Rating=4 -> MicrosoftPhoto:Rating=75
                // xmp:Rating=5 -> MicrosoftPhoto:Rating=100

                if (ratingToSet == 1)
                {
                    microsoftRating = 1;
                }
                else
                {
                    microsoftRating = (ratingToSet - 1) * 25;
                }

                qDebug() << "MicrosoftPhoto:Rating: " << QString::number(microsoftRating);
                meta.SetProperty("http://ns.microsoft.com/photo/1.0/", "Rating", QString::number(microsoftRating).toStdString(), 0);
            }

            // Delete old tags. (?)
            meta.DeleteProperty(kXMP_NS_DC, "subject");

            // Tags
            for (int i = 0; i < tags.size(); ++i)
            {
                string value = tags[i].toStdString();
                meta.AppendArrayItem(kXMP_NS_DC, "subject", kXMP_PropArrayIsOrdered, value, 0);
                //meta.SetArrayItem(kXMP_NS_DC, "subject", i + 1, value, 0);
            }

            meta.SetLocalizedText(kXMP_NS_XMP, "Description", "en", "en-US", description.toStdString(), NULL);

            // Update the Metadata Date
            XMP_DateTime updatedTime;

            // Get the current time. This is a UTC time automatically adjusted for the local time.
            SXMPUtils::CurrentDateTime(&updatedTime);
            //if (meta.DoesPropertyExist(kXMP_NS_XMP, "MetadataDate"))
            //{
                meta.SetProperty_Date(kXMP_NS_XMP, "MetadataDate", updatedTime, 0);
            //}

            // Now update alt-text properties
            //meta.SetLocalizedText(kXMP_NS_DC, "title", "en", "en-US", "Kind of pretty");

            // For debugging
            if (false)
            {
                // Serialize the packet and write the buffer to a file.
                // Let the padding be computed and use the default linefeed and indents without limits.
                string metaBuffer;
                meta.SerializeToBuffer(&metaBuffer, 0, 0, "", "", 0);

                //qDebug() << QString::fromStdString(metaBuffer);

                // Write the packet to a file as RDF
                writeRDFToFile(&metaBuffer, filename + "_XMP_RDF.txt");
            }

            // Check we can put the XMP packet back into the file.
            if (myFile.CanPutXMP(meta))
            {
                // If so then update the file with the modified XMP.
                myFile.PutXMP(meta);
            }
            else
            {
                // Silent for now. TODO: Should this be indicated in
                // the UI somehow?
                qDebug() << "XMP: Can't write to file.";
            }

            // Close the SXMPFile. This *must* be called. The XMP is not actually written and the
            // disk file is not closed until this call is made.
            myFile.CloseFile();
        }
        else
        {
            qDebug() << "XMP: Unable to open " << file;
        }
    }
    catch(XMP_Error & e)
    {
        qDebug() << "XMP ERROR: " << QString::fromStdString(e.GetErrMsg());
    }

    // Terminate the toolkit
    SXMPFiles::Terminate();
    SXMPMeta::Terminate();

    return 0;
}

int ImageViewContainer::xmpRead()
{
    qDebug() << "xmpRead()";

    string filename = file.toStdString();

    if (!SXMPMeta::Initialize())
    {
        qDebug() << "XMP: An error occurred initializing XMP.";
        return -1;
    }

    XMP_OptionBits options = 0;

    #if UNIX_ENV
        options |= kXMPFiles_ServerMode;
    #endif

    if (!SXMPFiles::Initialize(options))
    {
        qDebug() << "XMP: An error occurred initializing SXMPFiles.";
        return -1;
    }

    try
    {
        // Try using the smart handler.
        XMP_OptionBits opts = kXMPFiles_OpenForRead | kXMPFiles_OpenUseSmartHandler;

        bool ok;
        SXMPFiles myFile;

        // Open the file.
        ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
        if (!ok)
        {
            qDebug() << "XMP: No smart handler available for " + file + ". Trying packet scanning.";

            // Now try using packet scanning.
            opts = kXMPFiles_OpenForUpdate | kXMPFiles_OpenUsePacketScanning;
            ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
        }

        // If the file is open then read the metadata.
        if (ok)
        {
            qDebug() << "XMP: Opened: " << file;

            // Create the xmp object and get the xmp data.
            SXMPMeta meta;
            myFile.GetXMP(&meta);

            bool exists;

            // Stores the value for the property.
            string value;

            // XMP Rating
            exists = meta.GetProperty(kXMP_NS_XMP, "Rating", &value, NULL);
            if (exists)
            {
                rating = QString::fromStdString(value).toInt(&ok);
                if (!ok)
                {
                    rating = -1;
                }
            }
            else
            {
                rating = -1;
            }

            // Microsoft Rating (only look for this if xmp:Rating is missing)
            if (rating == -1)
            {
                // Required before we can call other functions that refer to this namespace
                // without getting an exception.
                std::string tmp;
                meta.RegisterNamespace("http://ns.microsoft.com/photo/1.0/", "MicrosoftPhoto", &tmp);

                exists = meta.GetProperty("http://ns.microsoft.com/photo/1.0/", "MicrosoftPhoto:Rating", &value, NULL);
                //exists = meta.GetProperty(kXMP_NS_XMP, "Rating", &value, NULL);
                if (exists)
                {
                    rating = QString::fromStdString(value).toInt(&ok);
                    if (!ok)
                    {
                        rating = -1;
                    }
                    else
                    {
                        // The Microsoft rating is 0, 25, 50, 75, 100.
                        rating /= 25;
                    }
                }
                else
                {
                    rating = -1;
                }
            }

            value.clear();

            qDebug() << "XMP Rating: " << rating;

            // Tags
            tags.clear();
            int arraySize = meta.CountArrayItems(kXMP_NS_DC, "subject");
            for (int i = 1; i <= arraySize; i++)
            {
                meta.GetArrayItem(kXMP_NS_DC, "subject", i, &value, 0);
                qDebug() << "XMP Tag[" << i << "]: " << QString::fromStdString(value);
                tags.append(QString::fromStdString(value));
            }

            value.clear();

            // Description
            meta.GetLocalizedText(kXMP_NS_XMP, "Description", "en", "en-US", NULL, &value, NULL);
            description = QString::fromStdString(value);
            qDebug() << "XMP Description: " << description;

            timestamp = QDateTime();
            XMP_DateTime updatedTime;
            // Get the current time. This is a UTC time automatically adjusted for the local time.
            SXMPUtils::CurrentDateTime(&updatedTime);
            if (meta.DoesPropertyExist(kXMP_NS_XMP, "MetadataDate"))
            {
                meta.GetProperty_Date(kXMP_NS_XMP, "MetadataDate", &updatedTime, 0);
                if (updatedTime.hasDate)
                {
                    if (updatedTime.hasTime)
                    {
                        timestamp = QDateTime(QDate(updatedTime.year, updatedTime.month, updatedTime.day), QTime(updatedTime.hour, updatedTime.minute, updatedTime.second));
                    }
                    else
                    {
                        timestamp = QDateTime(QDate(updatedTime.year, updatedTime.month, updatedTime.day), QTime(0, 0, 0));
                    }
                }
            }

            // Close the SXMPFile. The resource file is already closed if it was
            // opened as read only but this call must still be made.
            myFile.CloseFile();
        }
        else
        {
            qDebug() << "XMP: Unable to open " << file;
        }
    }
    catch(XMP_Error & e)
    {
        qDebug() << "XMP ERROR: " << QString::fromStdString(e.GetErrMsg());
    }

    // Terminate the toolkit
    SXMPFiles::Terminate();
    SXMPMeta::Terminate();

    return 0;
}

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    int rating;
    QList tags;
    QString description;
    QDateTime timestamp;

One final note: there is a code that deals with the MicrosoftPhoto:Rating XMP tag. It's because I'm on Windows and I noticed that if you click on a photo in Windows Explorer, it allows you to display/change some meta (such as star ratings) data directly in Explorer. When you do so, it sets the MicrosoftPhoto:Rating tag (as well as the tag xmp:Rating, I believe). Once, he put that, if your application updates the xmp:Rating tag but don't update the MicrosoftPhoto:Rating tag and the file returns on Windows, then he continues to use the old notation before your update app. (he seems to ignore xmp:Rating if MicrosoftPhoto:Rating is present)

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Published by: Sunny kichloo on July 5, 2012 06:55

Define/declare dates and use in CTE

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