This part will take you through basic and valuable orders utilized by SQLite developers. These orders are called SQLite speck orders and special case with these orders is that they ought not be ended by a semi-colon (;).
How about we start with composing a basic sqlite3 order at order brief which will furnish you with SQLite order brief where you will give different SQLite orders.
$sqlite3
SQLite version 3.3.6
Enter ".help" for instructions
sqlite>
For a posting of the accessible dab orders, you can enter ".help" any time. For instance −
sqlite>.help
The above order will show a rundown of different significant SQLite dab orders, which are recorded in the accompanying table.
Sr.No. | Command & Description |
---|---|
1 |
.backup ?DB? FILE Backup DB (default "main") to FILE |
2 |
.bail ON|OFF Stop after hitting an error. Default OFF |
3 |
.databases List names and files of attached databases |
4 |
.dump ?TABLE? Dump the database in an SQL text format. If TABLE specified, only dump tables matching LIKE pattern TABLE |
5 |
.echo ON|OFF Turn command echo on or off |
6 |
.exit Exit SQLite prompt |
7 |
.explain ON|OFF Turn output mode suitable for EXPLAIN on or off. With no args, it turns EXPLAIN on |
8 |
.header(s) ON|OFF Turn display of headers on or off |
9 |
.help Show this message |
10 |
.import FILE TABLE Import data from FILE into TABLE |
11 |
.indices ?TABLE? Show names of all indices. If TABLE specified, only show indices for tables matching LIKE pattern TABLE |
12 |
.load FILE ?ENTRY? Load an extension library |
13 |
.log FILE|off Turn logging on or off. FILE can be stderr/stdout |
14 |
.mode MODE Set output mode where MODE is one of −
|
15 |
.nullvalue STRING Print STRING in place of NULL values |
16 |
.output FILENAME Send output to FILENAME |
17 |
.output stdout Send output to the screen |
18 |
.print STRING... Print literal STRING |
19 |
.prompt MAIN CONTINUE Replace the standard prompts |
20 |
.quit Exit SQLite prompt |
21 |
.read FILENAME Execute SQL in FILENAME |
22 |
.schema ?TABLE? Show the CREATE statements. If TABLE specified, only show tables matching LIKE pattern TABLE |
23 |
.separator STRING Change separator used by output mode and .import |
24 |
.show Show the current values for various settings |
25 |
.stats ON|OFF Turn stats on or off |
26 |
.tables ?PATTERN? List names of tables matching a LIKE pattern |
27 |
.timeout MS Try opening locked tables for MS milliseconds |
28 |
.width NUM NUM Set column widths for "column" mode |
29 |
.timer ON|OFF Turn the CPU timer measurement on or off |
We should attempt .show order to see default setting for your SQLite order brief.
sqlite>.show
echo: off
explain: off
headers: off
mode: column
nullvalue: ""
output: stdout
separator: "|"
width:
sqlite>
Ensure there is no space in the middle sqlite> brief and speck order, else it won't work.
Formatting Output
You can utilize the accompanying grouping of spot orders to organize your yield.
sqlite>.header on
sqlite>.mode column
sqlite>.timer on
sqlite>
The above setting will deliver the yield in the accompanying organization.
ID NAME AGE ADDRESS SALARY
---------- ---------- ---------- ---------- ----------
1 Paul 32 California 20000.0
2 Allen 25 Texas 15000.0
3 Teddy 23 Norway 20000.0
4 Mark 25 Rich-Mond 65000.0
5 David 27 Texas 85000.0
6 Kim 22 South-Hall 45000.0
7 James 24 Houston 10000.0
CPU Time: user 0.000000 sys 0.000000
The sqlite_master Table
The expert table holds the critical data about your data set tables and it is called sqlite_master. You can consider its to be as per the following −
sqlite>.schema sqlite_master
This will create the accompanying outcome.
CREATE TABLE sqlite_master (
type text,
name text,
tbl_name text,
rootpage integer,
sql text
);