Posts (page 55)
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3 min readYou can find if a string exists in an Oracle column by using the SQL operator LIKE in a SELECT statement. For example, if you want to check if the string "example" exists in a column called "text_column" in a table called "example_table", you can write a query like this:SELECT * FROM example_table WHERE text_column LIKE '%example%';This query will return all rows from the table where the "text_column" contains the string "example".
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3 min readTo get the privileges assigned to only a materialized view in Oracle, you can use the following query:SELECT grantee, privilege FROM dba_tab_privs WHERE table_name = 'your_materialized_view_name';This query will display the users or roles that have been granted privileges on the specified materialized view. You can also replace 'dba_tab_privs' with 'user_tab_privs' if you want to see the privileges assigned only to the current user.
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5 min readIn Oracle, you can split a string into an array by using the "REGEXP_SUBSTR" function combined with a regular expression pattern. This function allows you to extract substrings from a string based on a specified pattern. You can then store the extracted substrings in an array by using a loop and adding each substring to the array. This process allows you to split a string into multiple elements and store them in an array for further processing or manipulation.
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5 min readTo draw a vertical line using wxPython, you can use the DrawLine() method of the wx.DC (Device Context) class. You need to first create a DC object and then call the DrawLine() method with the coordinates of the starting and ending points of the vertical line. For example: import wx class MyFrame(wx.Frame): def __init__(self): wx.Frame.__init__(self, None, -1, "Vertical Line Example", size=(400,300)) self.Bind(wx.EVT_PAINT, self.
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5 min readTo create users from a list in Oracle, you can use the CREATE USER statement followed by the username and password. You can also specify additional parameters such as default tablespace and temporary tablespace. Make sure to grant the necessary privileges to the users after creating them, such as granting them the required roles and privileges. This can be done using the GRANT statement.
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4 min readTo use a for loop for dates in Oracle, you can declare a range of dates using the TO_DATE function and then iterate through each date in the specified range. You can use the FOR loop construct in PL/SQL to loop through the dates and perform desired operations or calculations. Make sure to properly define the start and end dates for the range, and increment the loop accordingly to iterate through each date within the range.
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4 min readTo write the "&" symbol in button text in wxPython, you need to use double ampersands ("&&"). This is because a single ampersand is used to indicate keyboard shortcuts in wxPython buttons. By using double ampersands, you can display a single "&" symbol in the button text.[rating:c36a0b44-a88a-44f5-99fb-b0a6f274c6bc]How to write a "Help" button in wxpython?To create a "Help" button in wxPython, you can use the wx.
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3 min readTo accept value from a TextCtrl in wxPython, you can use the GetValue() method of the TextCtrl widget. This method allows you to retrieve the text entered by the user in the TextCtrl widget and store it in a variable for further processing. You can then use this value in your program as needed.[rating:c36a0b44-a88a-44f5-99fb-b0a6f274c6bc]What is the method for setting a maximum length in a TextCtrl in wxPython.
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5 min readTo move items smoothly in wxPython, you can use the drag and drop functionality provided by the wxPython library. This involves capturing mouse events, such as mouse down, mouse move, and mouse up, to track the movement of an item as it is being dragged across the screen. You can then update the position of the item as it is moved by the user.
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4 min readTo install wxPython using virtualenv, first create a new virtual environment using the virtualenv command. Once the virtual environment is activated, use pip to install wxPython by running the command "pip install -U wxPython". This will download and install the wxPython package inside the virtual environment, isolating it from the system-wide installation. You can then import wxPython in your Python scripts within the virtual environment without affecting other projects or the system.
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6 min readTo add input to a command line prompt from wxPython, you can use the wx.TextEntryDialog class to create a dialog box where the user can input the desired value. You can then retrieve the input from the dialog box and pass it to the command line prompt using the subprocess module in Python. By combining these two components, you can create a user-friendly interface for entering input to a command line prompt directly from a wxPython application.
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6 min readIn wxPython, you can set the relative position of widgets by using sizers. Sizers allow you to control the layout of widgets within a container, such as a frame or panel.To set the relative position of widgets, you can create a sizer object (such as a wx.BoxSizer or wx.GridSizer) and add your widgets to it using the Add method. You can then specify the position of each widget within the sizer by setting the proportion, flag, border, and alignment properties of the Add method.