12/14/2023 0 Comments Standard sqlite commands![]() It specifies the columns in the table and the data type of the data that will be stored in each column. The Create command is used to create a new table in a database. Below are some of the most commonly used SQL commands in SQLite, along with their examples. SQLite supports a large number of SQL commands that are used to manage databases and manipulate data. Preparing for SQL job interviews? The top SQL Interview Questions, prepared by experts, will definitely help you crack any high-paying jobs! NUMERIC: The NUMERIC data type is used to store exact numeric values, such as currency and financial data.DATE: This data type is used to store date and time values.BOOLEAN: A Boolean value can be either true or false.BLOB: A BLOB (Binary Large Object) is a collection of binary data stored as a single entity in the database.TEXT: This data type is used to store textual data, such as characters and strings.REAL: A real number or floating-point number is a value that can store decimal values.INTEGER: The INTEGER type is used to store signed whole numbers, including zero and negative values.NULL: A NULL value represents the absence of data in a column.Here are some of the data types supported by SQLite: The values kept in a column can be categorized using one of SQLite’s several storage classes or data types. SQLite was part of TCL before it became indepedent project.A relational database management system called SQLite uses dynamic typing, which implies that the type of data in a column is determined by the data in that column rather than by the type of the column itself. sqlite3 - CLI utility that allow you to create and work with SQLite datafiles from the command line.You should always be careful when using this command because once a table is dropped, all subsequent data is lost forever. This command is used when a developer wants to delete a table along with all its contents. The table with name "products" has been created: Let's see how it looks on the command line. A semicolon ( ) must be used to terminate any command. If you exit the SQLite program and want to reconnect your database, you must use the command: sqlite>.open altlinux.dbĬreating a table means that you must name the table, define the columns, and define the data type for each column. This does not require superuser privileges ( su -).Ī screenshot showing that our database named altlinux has been successfully created. In this tutorial, we will cover only the basic work with databases.įirst, let's create a database (the database name must be unique). The third type of commands are commands that allow users to get certain data from databases:Ĭreating, modifying and deleting a database Second group is the commands for the data manipulation: The first group is the commands responsible for the storage structure, as well as methods for accessing data from the database: They are classified into three groups according to their different functions throughout the volume. They are called standard commands because they are the most commonly used. When working with SQLite, there are common commands used for various actions in the database. Shows the current settings of the given parameters Make a copy of the database in text format All of these commands are unique in that they always begin with a dot (.). Meta commands are mainly used for administrative operations such as checking databases and specifying output formats. You can read more about updating the system here RPM.Īfter we have updated the system, we can start installing the SQLite package. 4 Creating, modifying and deleting a databaseīefore installing SQLite, it is highly recommended to upgrade your system.
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