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5 min readTo extract a substring from a column in Oracle, you can use the SUBSTR function. The syntax for the SUBSTR function is as follows:SUBSTR(column_name, starting_position, length)column_name: The name of the column from which you want to extract the substring.starting_position: The position in the column where the substring extraction should begin.length: The number of characters to extract from the starting position.
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5 min readTo order results by an in condition with Oracle, you can use the ORDER BY clause in your SQL query. Simply specify the column or expression you want to order the results by, followed by the ASC (for ascending) or DESC (for descending) keyword. If you want to order the results based on a specific list of values, you can include the IN condition within the ORDER BY clause. This will allow you to customize the order in which the results are displayed based on your specified criteria.
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4 min readTo insert data conditionally in Oracle, you can use the INSERT INTO statement with the WHERE clause. The WHERE clause allows you to specify a condition that must be met before the data is inserted into the table. For example, you can use a simple IF statement within the WHERE clause to check a condition and insert data based on that condition. You can also use subqueries or JOINs within the INSERT INTO statement to insert data conditionally from multiple tables.
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4 min readTo grant user privileges in Oracle, you need to have the appropriate permissions as a database administrator. To grant privileges, you can use the GRANT statement followed by the specific privileges you want to grant, such as SELECT, INSERT, UPDATE, DELETE, etc. You also need to specify the objects on which these privileges should be granted, such as tables, views, or sequences.
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4 min readIn Oracle, you can escape special characters by using the backslash () character. When you want to include a special character in a string, you can precede the special character with a backslash to tell Oracle to treat it as a literal character rather than as part of the syntax. For example, if you want to include a single quote (') in a string, you can escape it by writing it as follows: 'It's a beautiful day'.
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9 min readTo improve an update query in Oracle, you can consider several strategies. Firstly, make sure you are updating only the necessary columns and rows by using a WHERE clause to filter the records that need to be updated. Additionally, you can optimize the query by adding appropriate indexes to the columns involved in the WHERE clause for faster retrieval of data. It is also beneficial to avoid using functions or complex expressions in the update statement as they can slow down the query.
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6 min readTo create hook modules for PyInstaller, you can start by creating a new Python file with the naming convention "hook-module_name.py" in the hooks directory of your PyInstaller installation. In this file, you can define the hooks for specific third-party packages or modules that need to be included in the bundled executable.
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4 min readTo get variables of any package in Oracle, you can use the USER_ARGUMENTS view in the ALL_ARGUMENTS or DBA_ARGUMENTS views. These views provide information about the parameters and variables of stored procedures, functions, and packages in the database. You can query these views to retrieve details such as the data type, length, and mode of the variables within a specific package. By using SQL queries on these views, you can easily access and retrieve the variables of any package in Oracle.
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7 min readTo get pubsub to work with pyinstaller, you need to ensure that the pubsub library is included in the packaged executable file created by pyinstaller. This can be achieved by explicitly specifying the pubsub package as a hidden import in the pyinstaller command line. You can do this by adding the flag "--hidden-import pubsub" when running the pyinstaller command.
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3 min readTo remove or exclude modules and files from PyInstaller, you can use the "--exclude-module" and "--exclude" options when running PyInstaller from the command line. These options allow you to specify which modules or files you want to exclude from the final packaged executable.For example, to exclude a specific module, you can use the "--exclude-module" option followed by the module name. This will prevent PyInstaller from including that module in the final executable.
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4 min readTo limit the count of duplicate rows in Oracle, you can use the SQL SELECT statement along with the DISTINCT keyword to only retrieve unique rows from a table. You can also use the GROUP BY clause along with aggregate functions such as COUNT to identify and limit the count of duplicate rows based on specific columns.