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6 min readIn Oracle, you can parse JSON data using the JSON_VALUE, JSON_QUERY, and JSON_TABLE functions. JSON_VALUE is used to extract a scalar value from a JSON document, while JSON_QUERY is used to extract a JSON object or array. JSON_TABLE is used to extract data from a JSON document and convert it into relational format. You can also use the JSON_EXISTS function to check if a specified path exists in a JSON document.
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3 min readYou can find full duplicate rows in Oracle by using the following SQL query:SELECT * FROM your_table WHERE ROWID NOT IN (SELECT MIN(ROWID) FROM your_table GROUP BY column1, column2, ...);This query will return all rows that have duplicate values across all columns in the specified table. The ROWID function is used to identify which rows are duplicates, and the MIN function is used to find the minimum ROWID for each group of duplicate rows.
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3 min readTo increase a date by 1 month in Oracle SQL, you can use the ADD_MONTHS function. This function allows you to add a specified number of months to a given date.
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6 min readTo get parent child relationships with auto skip in SQL Oracle, you can use a recursive query. This can be achieved by using the CONNECT BY clause with PRIOR keyword to establish the parent-child relationships. You can also use the LEVEL pseudocolumn to filter out the desired depth of the hierarchy.
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2 min readTo use the greatest function with over partition by in Oracle, you can simply include the partition by clause after the over clause in your query. This allows you to calculate the greatest value within each partition specified in the partition by clause. The greatest function will then return the maximum value within each partition, rather than the overall maximum value across the entire dataset. This can be useful for analyzing data within distinct groups or categories.
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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.