Table of Contents
The three basic operations in a relational database are insertion, deletion, and modification.
DELETION – Deletion means removing data from the database. If the person’s name is removed, then that person will no longer be in the database. If a phone number is removed, then that number will not be stored in the database anymore.
INSERTION – Insertion means putting new data into the database. If a person’s name is inserted, then that person will be in the database. If a phone number is inserted, then that number will be stored in the database from now on.
MODIFICATION – Modification means editing an existing entry in the database. Modification is sometimes referred to as updating or changing data. Any data that is changed will remain the same, but with additional information.
Insertion is the process of adding new data to the database.
INSERTION – Insertion means putting data into the database. If a new person is added to the database, then that person will appear in the database, but not necessarily if there is already someone with the same name. If a new phone number is added, it will be stored in the database, but not necessarily if there is already a phone number with that area code and prefix.
INSERT – To insert means to put something within a larger object. For example, you might expect to see an insert in a newspaper, that is, something placed within another page of the newspaper. In a relational database you can “insert” data into the database by using the INSERT statement of SQL.
USING – To use something is to employ it for its intended purpose. “Using” in regards to databases refers to using indexes and using keys.
Deletion is the process of removing data from the database.
If the data in the database needs to be updated (not simply added), then insertions must be done. If deletions are needed, then deletions must be done. If you need to change the data already in the database, then modifications must be done. ===================
Wikipedia: “Catalan: Digestion is the part of a general enzyme hydrolysis, with amino acids released as fragments. In proteolysis this might be referred to as the amination step in translation.”
Wikipedia: “Fumigation is the process of attaching (hanging) to something.”
Abstract: The purpose of this project was to test the depth and accuracy of Wikipedia annotations. In order to do so, I decided to use Wikipedia as a reliable source for information on subjects that interested me. For various reasons, I did not want to use Wikipedia as a reliable source of information. But if I did, how could I be sure that the annotations were accurate? The answer came in the form of an article on the Wikipedia website entitled “Wikipedia: accuracy” which states that “a large number of articles use a highly repeatable process to ensure quality.” That process is called deletionism. In order to verify my hunch that Wikipedia annotations are accurate, I would need to test them as they were being developed. This article describes the process I followed and the results that I obtained.
Deletionism is used in developing Wikipedia articles such that they are internally consistent. This is accomplished by allowing pages to be deleted and then re-created at will (without taking into account any consensus among editors on the deletion). This process which is repeated as often as necessary until an article reaches a satisfactory degree of consistency is known as “editing” Wikipedia.
Modification is the process of changing existing data in the database.
All three basic operations (insertions, deletions, and modifications) are necessary to effectively manage a relational database. If you are unfamiliar with the basic idea of a relational database, it is worth taking a moment to review the meaning of “tables”.
A table is simply a list of records. A record stores information about individuals or entities in the database, such as their name and age. Normally there will be some number of columns in the table that are used to keep track of different aspects about that individual or entity. For example, one column could contain a person’s weight and another column could contain their blood type.
All three operations can be performed using SQL statements.
In addition to the three basic operations (insertions, deletions, and modifications), you can use SQL statements to do further conversions and display data. ===================
All three operations can be performed using SQL statements.
insert into table_name values (‘value’);
delete from table_name where column=’value’;
update table_name set column=’value’ where condition; ———— ————— —————————— ——————— —————— —————— ——————- ———— ————— ———- —– ———– — —– ——— ——- – —– ——The data in the Data Set is organized into records and fields. Records are subdivided into fields. Records can have more than one field. Each entry in a table is called a row. Each record that does not have primary key values is called a row of data. The column names for each table are case-insensitive but must be unique within the database.
Records and fields are separated from each other by commas, without spaces between them. This is the standard SQL layout.
