Repair Crashed Sqlite Database

Recover Corrupted and Damaged Sqlite .db, .sqlite and .sqlite3 Database Files

Sqlite is widely used and a popular relational database management system. The Sqlite is basically a client server database engine. It is highly reliable, self contained, full featured, embedded, public domain SQL database engine. It can be considered as a widely deployed database engine all over world. The Sqlite is embedded SQL database engine, but it is not compatible with the separate server process. It is totally different from the other SQL databases. The Sqlite database generally writes, reads directly to ordinary disk files. Some of the important points of Sqlite database are: storing of data in UTF-8(ANSI) & UTF-16(UNICODE). It even supports two versions of Sqlite database SQLITE2 & SQLITE3 and makes use of dynamic type system. It has an ability to store values have the following storage classes: Null, Integer, Real, Text, and BLOB.

Types of Sqlite Database File Extension

A .db file can be basically termed as a database file that is mostly used in many mobile devices like Android, Windows Phone, and IOS etc. The DB files are used to store the address books, SMS. In addition to it, the DB files are most commonly used in terms of storing the application data or the device data. The DB files are mainly stored in the SQLITE databases but can even be encrypted so that the users can not directly view the data. The DB files present on the mobile phones cannot be opened or manually edited as these are the support files comprising of information of device or any application. One of the examples of DB file is sms.db. It is an IOS file that stores the users text messages. The messages are stored in the /private/var/mobile/library/SMS/ directory on the system. Other example of the DB file is consolidate.db. It is a database file on the IOS device and it automatically tracks the information of the location.

These files contain the .sqlite file extension. These kinds of file are mainly aligned with the database created in the SQLITE in process library. The Sqlite library provides the users with a server less, a self contained SQL databases, transactional engine. Sqlite is basically a free application of database. The database files created in Sqlite are usually given by the .sqlite extension. It creates customer lists, inventory databases, or other database information. Sqlite file extensions are even used by Firefox browser. These types of file are generated by user while viewing the pages created in .sqlite format.

The database file stored in a .sqlite3 form comprises of the structured data records; that comprises of all data types & values. It is even used in case of embedding the SQL database for applications installed on iPhones or other mobiles.

What is Sqlite Database Corruption?

It is termed as that state in which the database of Sqlite moves in inaccessible state. It implies the files are corrupt. Users can repair Sqlite database or recover Sqlite data. In case the process fails, then what can a user do, have you ever given it a thought? The entire process fails and the users need to start everything from the scratch. Because of the process of corruption, the users usually get the error message like:

In PHP:

SQLSTATE: General error: 14 unable to open the database file

In PYTHON:

SQLITE3: OperationalError: Unable to open a database file

In case when the Sqlite database corruption occurs, the Sqlite file becomes inaccessible. Before digging it, let’s first understand the basic reasons behind the corruption of Sqlite database files.

As the Sqlite database files are just ordinary disk files, so in this case, the overwriting is possible. There is no way to defend Sqlite database from such an action of overwriting, in this case, there may occur many serious issues like:

Running the File Decryptor: While closing and reopening file decryptor, time and again, it overwrites threads managed on the Sqlite log files. It replaces entire data corruption issue occurs.

Restoration of Sqlite Database while Transaction is in Running mode: The backup job occurs at back-end of device, this creates backup of the Sqlite database. As transaction is not yet completed, backup job saves logs of previous state and also some logs of the earlier transactions. In the end, transactions ID does not match and users face the issue of corruption.

Deletion of Hot journals: Sqlite makes use of the auxiliary journal file for recovery of database. If a user renames deletes or moves the journal files from actual location, then Server fails to find the files easily. Henceforth, automatic database recovery is not performed.

The Sqlite provides users with a facility through which the users can lock the Sqlite database files. Few unwanted changes can be done by following the two different processes in case of single Sqlite database can cause the data corruption. For avoiding this, users can simply and easily lock Sqlite database. Being a helpful feature for the users, but, it may cause issues:

Lock Details Missing: Many file systems are treated as a reliable source in case of locking Sqlite database. These files have many irresolvable internal bugs which creates the lock details missing. In case of Sqlite database getting locked, and the lock details found missing, it gets corrupted.

Cancellation of POSIX Advisory Lock: While running a Sqlite database on the UNIX systems, the POSIX Advisory Lock facility is an essential form for the default locking. The systems easily call, Close(), or interrupts the locking action which leads to the Sqlite thread corruption. Linking of multiple copies in the Sqlite database is the only key reason in such corruption issues. 

Note: Systems call is what its name implies; it is a request for the operating system to perform something on the behalf of user’s program.

Protocols Contradiction: There are two protocols i.e., SQLITE3_vfs and SQLITE3_open_v2(), these protocols are very good at database handling. For working on the SQLITE databases, with two protocols same time then in that case, user gets contradicted.

Many Links to Single File: While linking up the Sqlite database to many links via the network connectivity, it causes the corruption in Sqlite database. Always avoiding such an inappropriate practice is good.

Unlink or Rename a Database: If a user renames any file present in the Sqlite database while being absent at same location, causes the unlinking in database of Sqlite and results in corruption process.

The synchronization command present in the Sqlite databases performs the true synchronization of the databases. In case, I/O barrier occurs, problem rolls back the database resulting in violation of the ACID property i.e., Atomicity, Consistency, Isolation and the durability. In this case, the Sqlite Server database also goes to resistant mode.

This failure takes place in storage media device; either it can be system hard disk or the flash memory. It causes the Sqlite database corruption. Many times, unwanted changes in storage media content cause many severe issues users of Sqlite. In that case, make sure whether the disk contains enough storage space or not. If storage occurs, users can write more data on the storage media. But in this case, there occurs no space for storing the data and the users write something to it, it results in the Sqlite database corruption.

Method to Repair Crashed Sqlite Database

Many cases occur where the users come across the corruption of the Sqlite databases. To avoid such issue, user needs to be always ready with valid backup. So, at the time of problem, the users can easily restore the Sqlite databases from it. For taking the backup of an Sqlite database, users can simply make use of the Windows NT-Backup utility.

Unfortunately, if users don’t have any valid backup file, the users need to repair Sqlite database file.

For repairing the Sqlite database, the users should follow the steps mentioned below:

  • Launch the DB Browser for SQLite on local machine and click on Execute SQL tab for running the database check command.
  • Write PRAGMA integrity check and hit on Play button. In case the Sqltie database is not corrupted, then the database is OK in that case.
  • In case, the users encounter the error in database, then exporting the database to SQL file is the best choice. For this click on File Tab >> Export >> Database to the SQL file.
  • In Export SQL dialog box, select object needed to be exported. Also, users should define other options too. Click on the OK button and export the entire database.
  • Now, the users need to import back to the Sqlite Browser. Again on the File tab present on top>> Import >> Database from the SQL file.

Make replica of the database file, and go to the spicework server and shut down the spicework and make a replica of the db file. For repairing the Sqlite to check, create and export, users should have the Sqlite pre-installed on the system. Download the Sqlite and put it in hard drive where it is required. In this case, the users can easily add path to the Sqlite on the system and allow the Sqlite to launch the Sqlite commands. Launch the MS-DOS Command and go inside the database directory to launch the Sqlite database.

Use command sqlite3 dspiceworks_prod.db.

Users can even check the integrity via pragma_integrity_check.

In case, if it is Ok, user does not need to repair the other treatment because the database is in healthy condition.

Afterwards, users can easily quit the Sqlite database by typing the:.quit

In case, the users encounter the Error Message, and can follow the Next Step.

Export the Data to the SQL File

  • For exporting data to SQL file, first of launch

echo .dump | sqlite3.exe spiceworks_prod.db > spiceworks_prod.sql

Create New Database

When the SQL file is created, the users can make a new database with an ease.

Before performing it, the users should not forget to rename old corrupt database.

For creating a new database, the users can easily launch:

sqlite3.exe -init spiceworks_prod.sql spiceworks_prod.db

The command easily creates the new database with data.

Now, import the database to the spiceworks

For importing the new database to spiceworks, users need to copy the db file to db folder. User should not forget to verify whether the Spiceworks is down before just copying the files. Afterwards launch the spicework and it works better.

Users can even dump the old database, and then restore it to another database or file. Use the following command to perform rest of the task:

# echo “.dump”| sqlite old.db| sqlite new.db

In this case, we gave a command to dump the Sqlite having old database and also redirected the output to other Sqlite process comprising of new db. It is basically same as that of dumping the file and then again recovering it. This process is quite fast and does not require a big file.

Some errors can be tried to recover manually but sometimes manually working on any method is not a correct approach as it creates problems for the users in terms of backup or issues related to the corruption. So, at times the use of a professional tool is a better way. By using the Sqlite database recovery tool, users can easily repair corrupt Sqlite file without any hassle. The tool has so many tremendous features that it can easily preview, recover tables, views, columns, triggers of the Sqlite files. It even renders the users with 3 options to save the files like save as Sqlite, MS Access or any other database. The tool even has no file size limitations imposed on any Sqlite file. It provides the user an option to easily search inside the Sqlite file by using the keywords or a phrase. It even provides the users with mapping of the Sqlite data types and recovers the Sqlite.db file created in Mozilla Thunderbird, Incredimail, and many more. It supports the multiple DSN i.e., SQL database and Access.

Sqlite Database Recovery Download

Working Steps of Sqlite Repair Tool

  • Download the setup of Sqlite file recovery software and open the Sqlite files by clicking on Open button.

open-sqlite-file

  • Select files, click open and load the database of Sqlite file. It begins the process of automatic scanning or loading. Once these files have been scanned, a message prompt appears describing the same. Click on OK and continue.

scanning-completed

  • View the details of Sqlite database. Check all the details and click on Export.

preview-data

  • Software provides three options for the Export:
  1. SQLITE Database
  2. MS ACESS Database
  3. Other Database

Select any database of your choice and then click on OK for the process.

export-to

  • The software provides the users with the data mapping option. Confirm the changes done and hit on OK button.

data-type-mapping

  • Finally select the destination path. Export process completes when the progress bar is 100%

exporting-orders-sqlite

  • Sqlite database repair tool displays the message box depicting the successful export on screen. After completion of entire process click on OK button.

export-completed-successfully