.backup ?DB? FILE

Backup DB (default “main”) to FILE

.bail ON|OFF

Stop after hitting an error. Default OFF

.databases

List names and files of attached databases

.dump ?TABLE?

Dump the database in an SQL text format. If TABLE specified, only dump tables matching LIKE pattern TABLE

.echo ON|OFF

Turn command echo on or off

.exit

Exit SQLite prompt

.explain ON|OFF

Turn output mode suitable for EXPLAIN on or off. With no args, it turns EXPLAIN on

.header(s) ON|OFF

Turn display of headers on or off

.help

Show this message

.import FILE TABLE

Import data from FILE into TABLE

.indices ?TABLE?

Show names of all indices. If TABLE specified, only show indices for tables matching LIKE pattern TABLE

.load FILE ?ENTRY?

Load an extension library

.log FILE|off

Turn logging on or off. FILE can be stderr/stdout

.mode MODE

Set output mode where MODE is one of −

• csv − Comma-separated values

• column − Left-aligned columns.

• html − HTML

  code

  insert − SQL insert statements for TABLE

  line − One value per line

  list − Values delimited by .separator string

  tabs − Tab-separated values

  tcl − TCL list elements

  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

  让我们尝试.show命令来查看SQLite命令提示符的默认设置。

  sqlite>.show
       echo: off
    explain: off
    headers: off
       mode: column
  nullvalue: ""
     output: stdout
  separator: "|"
      width:
  sqlite>
  

  确保在sqlite>提示符和点命令之间没有空格，否则将无法使用。

  格式化输出

  您可以使用以下点命令序列来格式化输出。

  sqlite>.header on
  sqlite>.mode column
  sqlite>.timer on
  sqlite>
  

  上面的设置将产生以下格式的输出。

  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
  

  sqlite_master表

  主表保存有关数据库表的关键信息，称为sqlite_master 。您可以看到其架构，如下所示：

  sqlite>.schema sqlite_master
  

  这将产生以下结果。

  CREATE TABLE sqlite_master (
     type text,
     name text,
     tbl_name text,
     rootpage integer,
     sql text
  );