Introduction In Oracle databases, a schema is a logical grouping of related objects, such as tables, views, and stored procedures. Each schema belongs to a specific database user and has a set of associated privileges. To list all tables in a schema in an Oracle database, you can use one of the views in the data dictionary. The `ALL_TABLES` view contains one row for each table in the current schema, while the `DBA_TABLES` view contains one row for each table in the entire database. To list the tables in a schema, you can use a SELECT statement to query the ... Read More

Introduction If you have a table in MySQL with a BLOB field that you would like to convert to a JSON field, it can be done by performing a series of ALTER TABLE statements. The process involves creating a new column with the desired data type (JSON), copying the data from the old column to the new column, dropping the old column, and renaming the new column to the original column name. It's important to note that BLOB fields are used to store binary data, and JSON is a text-based format for representing data. In order to convert a BLOB ... Read More

Introduction The epoch is the date and time relative to which a computer's clock and timestamp values are determined. Epoch time is commonly used in computer systems to represent a point in time. It is typically represented as a single integer value, which represents the number of seconds that have elapsed since the epoch. In SQL, you can convert an epoch time value to a date by using the to_timestamp() function. This function converts an epoch time value (which is typically stored as a BIGINT or INT data type) to a timestamp with time zone value. The resulting timestamp value ... Read More

Introduction In SQL Server, a schema is a container for database objects such as tables, views, and stored procedures. The `dbo` schema is the default schema for the database owner (also known as the "database principal"). There may be times when you want to change the schema of a database object in SQL Server. For example, you might want to move a table from one schema to another to better organize your database, or you might want to change the schema of an object to match the schema of other objects in your database. To change the schema of a ... Read More

Introduction Displaying employees in increasing order of their salaries in SQL Server involves a few steps. First, you need to have a database and a table that stores information about employees, including their salaries. Once you have that, you can use SQL commands to query the table and retrieve the data in the desired order. To retrieve the data in increasing order of salary, you can use the ORDER BY clause in a SELECT statement. The ORDER BY clause is used to sort the results of a query by one or more columns. In this case, you would use it ... Read More

Introduction Displaying the department with the most number of employees in SQL Server is a common task that can be accomplished using a SQL query. The query will typically involve joining the employees and departments tables on the department ID, grouping the results by department name, and counting the number of employees in each department. Then use aggregate functions like COUNT() and TOP 1 with ORDER BY clause to get the desired result. To display the department name that has the most number of employees in SQL Server, it requires to have two database tables - Employees and Departments with ... Read More

Introduction SQL editor tools are software applications that allow you to write and execute SQL statements. They typically provide a user interface that includes features such as syntax highlighting, auto-complete, and the ability to run queries and view the results. Some SQL editor tools are specifically designed to work with a particular database management system (DBMS), such as Oracle, MySQL, or Microsoft SQL Server, while others are more general purpose and can be used with any DBMS. SQL editor tools are commonly used by database administrators, developers, and data analysts to manage and manipulate data stored in relational databases. They ... Read More

SDHC and SDXC − what are they? What is the difference between SDHC and SDXC, did you know? SDHC vs SDXC will be discussed in this post. Additionally, it provides detailed instructions on basic safety measures to take when using these cards. A detailed Difference Between SDHC and SDXC is mentioned in this article. There are two different varieties of SD cards: SDHC and SDXC. Consequently, you must first study about the SD card in order to know the SDHC and SDXC. Secure Digital cards, or SD cards, are used to store files, music, photographs, and other types of data. ... Read More

We frequently notice an SD/MMC slot when we look at card readers. As a result, it makes one wonder what is the difference between MMC and SD interface? Many common characteristics and physical and electrical standards between MMC and SD cards are the same. The commands at the software level are the primary area where the two standards vary. Numerous hosts can support MMC and SD cards using the same socket due to their similarity. Actually, the MMC standard gave rise to SD. Although they no longer have identical sets of commands, the two are still electrically compatible. SD kept ... Read More

You've probably heard the terms megabyte and gigabyte thrown around a lot, but what do they actually mean? And more significantly, how do the two differ from one another? In comparison to one gigabyte (GB), one megabyte (MB) is equivalent to 1, 000 kilobytes. Therefore, when comparing sizes, a GB is significantly bigger than an MB. Gigabytes are larger, while megabytes are smaller. While the majority of users don't require more than one gigabyte of storage on their computer, if you're a power user or frequently work with huge files, you could. Don't worry, we're here to help. Below, we'll ... Read More