Generally, use it to read data, not to change data. Using db object from within custom SQL function implemented with QtScript, or custom collation (and so on.) should never do any INSERTs, UPDATEs, or DELETEs on the database, or the command might fail. If the function is not executed in any database context, then calling any of db functions will throw an exception. This applies for example if the script is executed as implementation of Custom SQL function. This program is not a visual shell for the sqlite command line tool, and does not require familiarity with SQL commands. Extra functions and objects The db objectĮvery script has access to the db object, which gives the script access to the database, that the script is executed for. Script input argumentsĪll arguments passed to scripts are available through global "arguments" array-like variable (which is common for ECMAScript), with argument at position 0 being the first argument passed to the script. Scripts are pre-compiled and cached in memory, so executing same script multiple times benefits from it. Result of the function is captured and returned by the plugin to SQLiteStudio. This plugin executes any scripts by putting the script as a body of anonymous function that is immediately executed. Nevertheless, it provides JavaScript support. It is historically named "QtScript", because in versions 3.2.x and older, the the Qt module providing this implementation was names QtScript. In this tutorial, you have learned how to dump data into a text file using the SQLite dump command and other commands.QtScript implements ECMAScript language, which is pretty much what JavaScript is. To dump data from other tables, you need to issue the SELECT statements to query data from those tables. sqlite> select * from artists Code language: SQL (Structured Query Language) ( sql )Ĭheck the content of the data.sql file, if everything is fine, you will see the following output: The following command returns data from the artists table. Third, issue the SELECT statements to query data from a table that you want to dump. The following command sets the output file to the data.sql file. Do you know any way to create sql script from existing database in SQLite 3 sql sqlite Share Follow edited at 7:12 asked at 6:43 Piotr Wdowiak 63 1 5 What kind of script Also note that tool recommendations are off-topic on stack overflow but this question probably can be edited to be not about tools but rather methods. Second, set the output to a text file instead of the default standard output. mode insert Code language: CSS ( css )įrom now on, every SELECT statement will issue the result as the INSERT statements instead of pure text data. To dump the data of a table into a text file, you use these steps:įirst, set the mode to insert using the. Dump data of one or more tables into a file Arrays and objects returned from this function will be transformed into string representation as standard for those types. The results type is preserved, but only for primitive types (integer, double, string). transparent database attaching mechanism built into the SQL Editor of SQLiteStudio. The following picture shows the content of the chinook_structure.sql file. Syntax db.eval(sql) Executes given sql on the database and returns results. Run your sql and sql scripts, manage users, create and edit objects. The following commands set the output file to chinook_structure.sql file and save the table structures into the chinook_structure.sql file: sqlite>. To dump the table structures in a database, you use the. Dump tables structure only using schema command The following picture shows the contents of the albums.sql file. quit Code language: JavaScript ( javascript ) For example, the following command saves the albums table to the albums.sql file. To dump a specific table, you specify the table name after the. exit Code language: JavaScript ( javascript ) Dump a specific table using the SQLite dump command The following commands specify the output of the dump file to chinook.sql and dump the chinook database into the chinook.sql file. To issue the output to a file, you use the. dump command outputs the SQL statements on screen. dump command converts the entire structure and data of an SQLite database into a single text file.īy default, the. To dump a database into a file, you use the. Sqlite> Code language: JavaScript ( javascript ) The following command opens a new SQLite database connection to the chinook.db file. Dump the entire database into a file using the SQLite dump command dump command that gives you the ability to dump the entire database or tables into a text file. Also, you can use special commands, which are known as dot commands to perform various useful database operations. SQLite project delivers the sqlite3 tool that allows you to interact with the SQLite database using a command-line program.īy using the sqlite3 tool, you can use the SQL statements to query or update data in the database. Summary: in this tutorial, you will learn how to use the SQLite dump command to back up and restore a database.
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