Showing posts with the label IBM Cloudscape

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How to Check Column Nulls and Replace: Pandas

Here is a post that shows how to count Nulls and replace them with the value you want in the Pandas Dataframe. We have explained the process in two steps - Counting and Replacing the Null values. Count null values (column-wise) in Pandas ## count null values column-wise null_counts = df.isnull(). sum() print(null_counts) ``` Output: ``` Column1    1 Column2    1 Column3    5 dtype: int64 ``` In the above code, we first create a sample Pandas DataFrame `df` with some null values. Then, we use the `isnull()` function to create a DataFrame of the same shape as `df`, where each element is a boolean value indicating whether that element is null or not. Finally, we use the `sum()` function to count the number of null values in each column of the resulting DataFrame. The output shows the count of null values column-wise. to count null values column-wise: ``` df.isnull().sum() ``` ##Code snippet to count null values row-wise: ``` df.isnull().sum(axis=1) ``` In the above code, `df` is the Panda

How IBM Cloudscape supports online and offline Backups

IBM Cloudscape is a Java-enabled Object Relational Database Management System (ORDBMS). It supports complex SQL statements, transaction management, and provides multi-user support in the Database Management System (DBMS). You can create two types of backups of the Cloudscape database, online backup and offline backup. You can make backups of a database and the log file of the database. When restoring the database, you need to restore the log file and the database. The below picture shows structure of Cloudscape system. You need to understand the structure and contents of a Cloudscape system in order to make backups and restore Cloudscape databases. A Cloudscape system consists of a system directory, one or more Cloudscape databases, and the system properties and configuration settings. A system directory contains a properties file called and an information and error log file called db2j.log. Each database in a Cloudscape system is stored in a subdirectory,