sql - How to protect 1 column in table from updation/deletion? -

-

अपडेट / हटाए जाने से तालिका में 1 कॉलम की सुरक्षा कैसे करें

केवल पहुंच पढ़ने की बजाय, क्या इस मामले में ट्रिगर काम करेगा?

आप एक एकल स्तंभ के लिए अद्यतन विशेषाधिकार रद्द नहीं कर सकते हैं, लेकिन आप कॉलम को अद्यतन कर सकते हैं जो परिभाषित कर सकते हैं :

मान लें कि आपकी तालिका में तीन स्तंभ हैं: column_1, column_2, column_3 और आप some_user को column_3 को अपडेट करने से रोकना चाहते हैं। आप निम्न कार्य कर सकते हैं: 

  चुनना अनुदान, some_table पर some_table पर डालें; Some_user पर some_table पर अनुदान अद्यतन (स्तंभ 1, स्तंभ 2);

उपयोगकर्ता सभी डेटा देख सकता है, नई पंक्तियों को सम्मिलित कर सकता है ( column_3 के लिए डेटा शामिल करें), लेकिन some_user में < कोड> स्तंभ_3 ।


Comments

Post a Comment

Popular posts from this blog

apache - 504 Gateway Time-out The server didn't respond in time. How to fix it? -

-
Using a form submission on an embedded iframe , the customer downloads a compressed log file Requested. The request was sent to the server, which is the compressed log files, perform some database operations and returns a compressed file. After just 2 minutes, 504 gateway time-out server did not respond timely message on browser net panel How to fix this error? The log files were taking a long time to compress, and timeout was set to 2min The error was fixed by extending the file file: # # timeout: The number of seconds before getting the time out. # # # Timeout 120 timeout 600
Read more

c# - .net WebSocket: CloseOutputAsync vs CloseAsync -

-
We have a working ASP.NET Web API REST service, which is one of the methods of our controller, HTTPTTEX. .) Socket handler code looks something like this ... Public async task socket handler (AspNetWebSocketContext context) {_webSocket = context.WebSocket; ... while (! Cts.IsCancellationRequested) {WebSocketReceiveResult Results = _webSocket.ReceiveAsync (Input Segment, cts.Token) .Result; WebSocketsStateCollusocketState = _webSocket.State; If (result.MessageType == WebSocketMessageType.Close || currentSocketState == WebSocketState.CloseReceived) {// What should I use. CloseAysnc () or. CloseOutputAsync ()? _webSocket.CloseOutputAsync (WebSocketCloseStatus.NormalClosure, "Client Requested", cts.Token). Wait (); } If (currentSocketState == WebSocketState.Open) {...}}} .What is the difference between .CooseAsync () and CloseOutputAysnc ()? I tried both of them and they both seemed to work fine but some difference should be the same they both describe very similar to...
Read more

c++ - How to properly scale qgroupbox title with stylesheet for high resolution display? -

-
I am trying to apply a stylesheet for QGroupBox (QT4.8), which works on the normal screen ( 96 dpi) high resolution screen (Yoga 2 Pro, 3200x1800, 275 dpi, windows 8.1). The following style looks good on the 275 dpi screen, but the top margins on a regular 96 dpi screen are far too big. QGroupBox {border: 1px solid red; Range radius: 7px; Margin-top: 12x; } QGroupBox :: Title {subcontrol-origin: margin; Subcontrol-position: left above; Padding-left: 10px; Padding-right: 10px; } Changing the top-margin has an effect, but I did not get a proper setting which works on both screens. If I shorten the value, the content of the group box overlaps with the title on 275 dpi screen. I was also playing with units "East", "PX", "MX", "PT". Reading the document I would have guessed, "2 X" was the correct solution, which should be scaled with different screen resolutions. Without the stylesheet, the groupbox works well on both screens. ...
Read more