Sqlite文件在ubunut的查看

Posted 2021-01-18 未将对象引用设置到对象的实例

 

 

 

 

1.

How to list the tables in a SQLite database file that was opened with ATTACH?

 

The .tables, and .schema "helper" functions don\'t look into ATTACHed databases: they just query the SQLITE_MASTER table for the "main" database. Consequently, if you used

ATTACH some_file.db AS my_db;

then you need to do

SELECT name FROM my_db.sqlite_master WHERE type=\'table\';

Note that temporary tables don\'t show up with .tables either: you have to list sqlite_temp_masterfor that:

SELECT name FROM sqlite_temp_master WHERE type=\'table\';

  

• 81
  Only "SELECT name FROM sqlite_master WHERE type=\'table\'" works for me – vladkras Dec 15 \'15 at 13:28
• 2
  SELECT name FROM my_db.sqlite_master WHERE type=\'table\'; this does not work for me (for the attached DB) and it throws error as: no such table exist "my_db.sqlite_master" – kanika Jul 27 \'16 at 7:16
•  
  what you meant by temporary tables? Are there any when I just opened SQLite db file? – Ewoks May 7 \'17 at 13:20
•  
  Temporary tables are those created with CREATE TEMPORARY TABLE SQL commands. Their contents are dropped when the current database connection is closed, and they are never saved to a database file. – Anthony Williams May 8 \'17 at 14:37
• 1
  Under sqlite3 command mode and run ATTACH "some_file.db" AS my_db; It worked! – John_J Dec 25 

 

 

 

 

2.You could attach another database file from the SQLite shell:

sqlite> attach database \'RelDb.sqlite\' as RelDb;

sqlite> .databases
main: /db/UserDb.sqlite
RelDb: /db/RelDb_1.sqlite

sqlite> .tables
RelDb.collectionRelationship  contentStatus               
RelDb.contentRelationship     genres                      
RelDb.leagueRelationship      recordingFilter             
RelDb.localizedString         syncedContentStatus         
accountLevelSettings          syncedThumbs                
collectionActivity            thumbs                      

The tables from this 2nd database will be accessible via prefix of the database:

sqlite> select count(*) from RelDb.localizedString;
2442