![]() If you need to store a high volume of data that updates regularly, chances are a human cannot do this task manually. Depending on the nature of the data, it can be created within your organization or received from an external party. Who/what will populate the data into these tables?ĭo we need processes to automatically populate the tables?ĭata inception has to happen somewhere. How much data will be populated into these tables? This factor is often overlooked and can easily cause a database project to fail. If the data is not maintainable and kept up to date, then the design has already failed. Populating data should be part of the planning process too. But design is not the only factor to consider. It might be a good idea to draft a diagram showing the tables and how they are related. What will their parent/child relationships be? What tables will I need to fulfill those requirements? Get a free trial today and find answers on the fly, or master something new and useful. Join the O'Reilly online learning platform. There are critical questions that should drive your design: You need to plan carefully because bad database design is sure to cause regrets down the road. When you create your own tables to support your business, it should not be done lightly. Sometimes, though, we will want to CREATE new tables, as well as INSERT, UPDATE, and DELETE records. A SELECT statement is a read-only operation. We have done analysis operations that read data and transform it in interesting ways, but none of this physically changes the data in the tables. So far in this book, we have only learned how to be consumers of data with the SELECT statement. This is Chapter 9 from "Getting Started with SQL," by Thomas Nield any cross-reference links to other areas of the book will be unavailable, as this chapter is excerpted from a larger work. For now, let's proceed to the next chapter.Thomas Nield will teach SQL Fundamentals for Data, a hands-on online training course for beginners on core database and SQL fundamentals, October 4-5, 2016, from noon to 3 p.m. You can perform restoration from the generated testDB.sql in a simple way as follows −Īt this moment your database is empty, so you can try above two procedures once you have few tables and data in your database. The above command will convert the entire contents of testDB.db database into SQLite statements and dump it into ASCII text file testDB.sql. dump dot command to export complete database in a text file using the following SQLite command at the command prompt. quit command to come out of the sqlite prompt as follows − Once a database is created, you can verify it in the list of databases using the following SQLite. ![]() If you have noticed while creating database, sqlite3 command will provide a sqlite> prompt after creating a database file successfully. This file will be used as database by SQLite engine. The above command will create a file testDB.db in the current directory. If you want to create a new database, then SQLITE3 statement would be as follows −Įnter SQL statements terminated with a " " Syntaxįollowing is the basic syntax of sqlite3 command to create a database: −Īlways, database name should be unique within the RDBMS. You do not need to have any special privilege to create a database. In SQLite, sqlite3 command is used to create a new SQLite database.
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