What is SQLite Pragma?

What is the meaning of pragma

Compiler pragmas, also known as directives, allow you to give the compiler extra information that can change compilation details that are not otherwise under your control. For instance, the pack pragma affects the arrangement of data inside a structure.

What is pragma command

A PRAGMA value can be read and set depending on the needs, and the SQLite PRAGMA command is a special command to be used to control different environmental variables and state flags within the SQLite environment.

What is pragma foreign key

The application can use the PRAGMA foreign_keys command to enable or disable foreign key constraints at runtime if the SQLite library was built with support for them.

What is pragma table info

The table_info pragma is used to request details about a particular table, and the result set will include one row for each table column.

What is pragma Integrity_check

Please note that PRAGMA integrity_check is not guaranteed to find all errors, so you can only use it to check for broken databases, not for healthy databases. PRAGMA integrity_check behaves like a SELECT query that returns results in a single row. To read the results with sqlite3_exec, you need to use a callback.

What is schema in SQLite

The schema for a database is a description of all the other tables, indexes, triggers, and views that are contained within the database and is stored in a single “schema table” that is part of every SQLite database.

What is sqlite3_prepare_v2

sqlite3_bind_int(res, 1, 3); The sqlite3_bind_int() function binds an integer value to the prepared statement. sqlite3_prepare_v2() compiles the SQL query.

What is SQLite journal mode

Journal files are used by SQLite to roll back transactions as a result of an explicit ROLLBACK command or because an unrecoverable error (such as a constraint violation) was encountered. The journal mode regulates how the journal file is stored and processed.

What is Wal mode

Due to WAL modes persistence, applications can be changed to use SQLite in WAL mode without altering the application itself; all that is required is to run the command “PRAGMA journal_mode=WAL;” on the database file(s), then restart the application.

What does sqlite3_exec return

When a ROLLBACK operation occurs on the same database connection as a pending read or write, the pending read or write may fail with an SQLITE_ABORT or SQLITE_ABORT_ROLLBACK error. Sqlite3_exec() will return SQLITE_ABORT in this case.

Does SQLite support a BLOB type

SQLite enables you to store BLOB data in any column, even columns that are declared to hold some other type. BLOBs can even be used as PRIMARY KEYs.

How do I view tables in SQLite

There are a few steps to see the tables in an SQLite database:

1. The tables in your database are listed here:.tables.
2. List the tables appearance:.schema tablename.
3. Print the entire table: SELECT * FROM tablename;
4. SQLite prompt command to list all available options is.help.

How fast is SQLite

For most common operations, SQLite 2.7. 6 is frequently (and sometimes even twice as quickly) as MySQL 3.23. 41. SQLite does not process CREATE INDEX or DROP TABLE operations as quickly as the other databases.

What is the latest version of SQLite

Sqlite

Which database is natively supported by Android

Since it has been around since 2000 and is arguably the most popular relational database engine in the world, SQLite is probably well-known to most mobile developers. Among its many advantages is Android native support.

Which of the following commands are used to format the output

The default output mode is list, where each record of a query result is written on one line of output and each column within that record is separated by a specific separator string. You can switch between these output formats using the . mode dot command.

What is a pragma in C

These directives, known as pragma in the standard and prefixed by the STDC, are provided by the C standard in order to provide extra required details to the C compiler. These extra details can be anything that was somehow not passed within the program or the code logic.

What is pragma the goddess of

Pragma is the kind of love experienced by spouses who have been married for many years and transcends the physical; it is the kind of love where so much no longer needs to be said because it is simply understood by both parties, as they truly have become part of each other.