Sqlite Batch File Insert
Make your SQLite bulk inserts very fast in C#.NET. In SQLite if you insert one record at a time then they are wrapped in individual transactions. In order to for your bulk inserts to perform very fast then you need to wrap them all in a single transaction. See SQLite FAQ. I was able to insert 1 million rows in about 4 seconds. Re: insert image into db - windows batch. > An image (assuming you mean a file like a.jpeg or.png file) is just a long run of bytes. You can store a long run of bytes in a SQLite database as data of type 'BLOB'. This isn't a string, or a number, or a date, it's just a long run of bytes which is stored exactly as supplied with no interpretation.
I'd like to have a one line batch file: sqlite3 test 'insert into testable values ('value1','value2')' have you tried something like: echo insert into testable values ('value1', 'value2'); sqlite3 test note ';' at end of statement and ' ' pipe char in command line. Run sqlite from a batch file. Hi All, I am trying to execute MS DOS batch file from C# code using system.diagnostics to run a sequence of sqlite3 commands to output query results in a '.csv'. Optimizing batch inserts, SQLite. I am playing with different buffer sizes to be inserted into the local SQLite DB and have found that it takes nearly 8 minutes to inserts 10,000,000 rows of data, when buffer size is 10,000. In other words, it takes 1,000 writes to store everything. 8 minutes to store 10,000,000 seems a bit too long. You could even use placeholders in the batch file for the name of the database file and the SQL command file. BTW the wxSQLite3 1.8.3 release contains a SQLite3 shell (named sqlite3shell.exe) for Windows supporting encryption. Squeezing Performance from SQLite: Insertions. Jason Feinstein Blocked Unblock Follow Following. Consider re-using SQLiteStatement batch-insert objects directly to do some more middleman.
Is it possible to write scripts that contain SQLite dot commands ( vis. .read file.sql; .separator ,; .import file.csv;
)?
How To Create A Batch File
I'm building and repeatedly rebuilding an SQLite database and need to type in roughly twenty four dot command statements every time I rebuild the database. It would be really nice if I could put those commands in a script and have SQLite read them.
Is there a way to put dot commands ( not SQL statements ) into a script and have SQLite run them?
I'm on Mac OS X using bash.
2 Answers
I searched the Internet for an answer last night and found nothing. Of course, today after posting this question I try again--and find an adequate response almost immediately.
The gist of it? Put your commands in a text file and direct it to SQLite using the input file descriptor, or just script everything in a bash script.
First Method:
sqlite3 database.db < commands.txt
Second Method:
And then on the command line:
Batch File
As an alternative, which I consider simpler, you can just use the .read
command. From the command line of your OS (terminal in Mac OS X), type:
It will start sqlite3
, use the mentioned database, perform all of the commands in script_full_of_dot_commands
, and leave.
For instance, let's assume you have the following files:
script_full_of_dot_commands: A file with both .commands
and SQL commands
:
file.sql: A file with just SQL commands.
file.csv: a data file to fill a table
The result of performing
is
Check also: Running a Sqlite3 Script from Command Line from StackOverflow.
joanoloDownload Batch File
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A simple actions to compare SQLite and LiteDB v3
Results:
5.000 records | LiteDB #1 | LiteDB #2 | LiteDB #3 | SQLite #1 | SQLite #2 | SQLite #3 |
---|---|---|---|---|---|---|
Insert | 4.999 ms | 5.690 ms | 4.839 ms | 46.379 ms | 49.296 ms | 4.107 ms |
Bulk | 236 ms | 280 ms | 219 ms | 122 ms | 122 ms | 106 ms |
Update | 3.674 ms | 3.784 ms | 3.242 ms | 47.470 ms | 48.490 ms | 4.101 ms |
CreateIndex | 176 ms | 174 ms | 176 ms | 13 ms | 36 ms | 8 ms |
Query | 204 ms | 208 ms | 93 ms | 457 ms | 463 ms | 468 ms |
Delete | 157 ms | 207 ms | 140 ms | 11 ms | 13 ms | 3 ms |
Drop | 17 ms | 56 ms | 14 ms | 11 ms | 25 ms | 3 ms |
FileLength | 7.580 kb | 7.576 kb | 7.572 kb | 3.824 kb | 3.856 kb | 3.824 kb |
Low is better
LiteDB
- #1 Default
- #2 Encrypted
- #3 Exclusive mode and no journal
Sqlite Batch File Inserts
SQLite
- #1 Default
- #2 Encrypted
- #3 No journal
Batch File Commands
Tested on MacBook Pro 2012 i5, Win10, 8Gb RAM, SSD