Hello I am practising and learning SQLite,
I created a SQLite file manually on VSCODE I call the file project_1.sqlite but when I try run the command
sqlite3 project_1.sqlite
i get
$ sqlite3 project_1.sqlite
SQLite version 3.36.0 2021-06-18 18:36:39
Enter ".help" for usage hints.
sqlite>
then when I say SELECT * FROM friends;
I get
sqlite> SELECT * FROM friends;
Error: file is not a database
sqlite>
I have already set up my SQLite inside the Control Pannel
Why am I getting the Error: file is not database ??
my project_1.sqlite file I already have populated it like this:
CREATE TABLE friends (
id INTEGER,
name TEXT,
birthday DATE
);
INSERT INTO friends (id, name, birthday)
VALUES (1, 'Ororo Munroe', '1940-05-30');
INSERT INTO friends (id, name, birthday)
VALUES (2, 'Sham', '1990-01-01');
INSERT INTO friends (id, name, birthday)
VALUES (3, 'Maria', '1991-01-01');
UPDATE friends
SET name = 'Storm'
WHERE id = 1;
ALTER TABLE friends
ADD COLUMN email TEXT;
UPDATE friends
SET email = 'storm#bffemail.com'
WHERE id = 1;
UPDATE friends
SET email = 'sham#bffemail.com'
WHERE id = 2;
UPDATE friends
SET email = 'maria#bffemail.com'
WHERE id = 3;
DELETE FROM friends
WHERE id = 1;
SELECT * FROM friends;
I have Windows but I have installed Bash so I am using Bash commands hope that makes sense I dont have Linux I am new to Programming as well sorry
I am using snowflake
I am looking to insert data to a table while using a variable
The purpose of using the variable is so when I can change it without doing a find and replace all
CREATE OR REPLACE TABLE DB1.PUBLIC.HUMANS (
HUMAN VARCHAR(32)
)
;
The following works
INSERT INTO DB1.PUBLIC.HUMANS
SELECT 'SUCESS';
The following does not work
SET EXPORT_TABLE = 'DB1.PUBLIC.HUMANS';
INSERT INTO TABLE($EXPORT_TABLE)
SELECT 'FAILURE';
HOWEVER this works.
SELECT * FROM TABLE($EXPORT_TABLE);
Is there is a way to insert into a table defined by a table literal?
reference documentation:
https://docs.snowflake.com/en/sql-reference/literals-table.html
https://docs.snowflake.com/en/sql-reference/sql/insert.html
======================================================
Update: Answer found by comments below.
Thanks to Biraja Mohanty and Greg Pavlik
To make this work have to wrap the IDENTIFIER().
INSERT INTO IDENTIFIER($EXPORT_TABLE);
https://docs.snowflake.com/en/sql-reference/session-variables.html
SET EXPORT_TABLE = 'DB1.PUBLIC.HUMANS';
INSERT INTO identifier($EXPORT_TABLE)
SELECT 'FAILURE';
I am unable to insert Hindi text with passing parameter Please guid me through sql query and passing parametr only .
It is working --
insert into MyTable (HindiText) values (N'जिए जाने किस रस्म जारी है')
but it is not working (Why)
declare #HindiText nvarchar(max)='जिए जाने किस रस्म जारी है';
insert into MyTable (HindiText) values (N#HindiText)
declare #HindiText nvarchar(max)='जिए जाने किस रस्म जारी है';
insert into MyTable (HindiText) values (N#HindiText)
I have made a demo for you Please try this.
declare #HindiText nvarchar(max)=N'जिए जाने किस रस्म जारी है';
insert into MyTable (HindiText) values (#HindiText)
NOTE: Make sure the data type of table column is NVARCHAR. And before write Hindi text their sud be N is there.
I am new to database. I am trying to create a database and table in it.
but unable to save and open again after exiting from sqlite.
I am using sqlite3 3.6.20 on centOS, when i will enter following command
.save ex1.db or .open ex1.db
it will print following error message.
Error: unknown command or invalid arguments: "save". Enter ".help" for help
Error: unknown command or invalid arguments: "open". Enter ".help" for help
and when Print .help
it wont show any command related to save and open existing database.
thanks in advance.
I am trying to create a database and table in it. but unable to save and open again after exiting from sqlite.
You don't need to save. Each transaction writes to disk. (More or less.)
To create the database "test.sl3", you can do this. (From the command line. Programs work about the same way.)
$ sqlite3 test.sl3
SQLite version 3.8.7.2 2014-11-18 20:57:56
Enter ".help" for usage hints.
sqlite> create table test (test_id integer primary key);
sqlite> insert into test values (1);
sqlite> select * from test;
1
.quit
No .save. Now load the database again.
$ sqlite3 test.sl3
SQLite version 3.8.7.2 2014-11-18 20:57:56
Enter ".help" for usage hints.
sqlite> select * from test;
1
The data is still there.
You're supposed to provide a filename as an argument for the .save command, e.g.:
sqlite> .save ex1.db
docs: http://www.sqlite.org/cli.html
as Mike pointed out in his answer, you should provide a file name to put the database in.
If you did a lot of work and you did not provide a file name up front and you work in a version in which the .save command is not yet available (you quote that sqlite3 3.6.20 does not know it and I also do not see it in sqlite3 version 3.8.2) you can use the .backup command
sqlite> .help
[...]
.backup ?DB? FILE Backup DB (default "main") to FILE
$ sqlite3
[...]
sqlite> create table mytable ( column1 text, column2 integer );
sqlite> insert into mytable values ( 'ENTRY1', 1 );
sqlite> insert into mytable values ( 'ENTRY2', 2 );
sqlite> .backup main temp.db
sqlite> .quit
$ sqlite3 temp.db
[...]
sqlite> .schema
CREATE TABLE mytable ( column1 text, column2 integer );
sqlite> select * from mytable;
column1 column2
---------- ----------
ENTRY1 1
ENTRY2 2
Use Sqlite3 ex1.db to open your database. After that, all queries will take effect in your DB.
Maybe try using an absolute path instead of a relative path.
I am in VS Code using the SQLite extension by alexcvzz.
When I use a relative path, I get an error.
CREATE TABLE test (id INTEGER, name TEXT);
INSERT INTO test (id, name) VALUES (1, "Hello");
.save ex1.db
When I use an absolute path, it works.
CREATE TABLE test (id INTEGER, name TEXT);
INSERT INTO test (id, name) VALUES (1, "Hello");
.save /Users/zacharyargentin/databases/ex1.db
Note: In the VS Code extension you have to choose a database before you run the query, so I chose the :memory: database, which is the default in-memory database. This database deletes itself as soon as you close the connection (so if you want to keep it, you have to save it like I did in the example above).
I have 2 SQLite databases with common data but with different purposes and I wanted to avoid reinserting data, so I was wondering if it was possible to copy a whole table from one database to another?
You'll have to attach Database X with Database Y using the ATTACH command, then run the appropriate Insert Into commands for the tables you want to transfer.
INSERT INTO X.TABLE SELECT * FROM Y.TABLE;
// "INSERT or IGNORE" if you want to ignore duplicates with same unique constraint
Or, if the columns are not matched up in order:
INSERT INTO X.TABLE(fieldname1, fieldname2) SELECT fieldname1, fieldname2 FROM Y.TABLE;
Easiest and correct way on a single line:
sqlite3 old.db ".dump mytable" | sqlite3 new.db
The primary key and the columns types will be kept.
Consider a example where I have two databases namely allmsa.db and atlanta.db. Say the database allmsa.db has tables for all msas in US and database atlanta.db is empty.
Our target is to copy the table atlanta from allmsa.db to atlanta.db.
Steps
sqlite3 atlanta.db(to go into atlanta database)
Attach allmsa.db. This can be done using the command ATTACH '/mnt/fastaccessDS/core/csv/allmsa.db' AS AM;
note that we give the entire path of the database to be attached.
check the database list using sqlite> .databases
you can see the output as
seq name file
--- --------------- ----------------------------------------------------------
0 main /mnt/fastaccessDS/core/csv/atlanta.db
2 AM /mnt/fastaccessDS/core/csv/allmsa.db
now you come to your actual target. Use the command
INSERT INTO atlanta SELECT * FROM AM.atlanta;
This should serve your purpose.
For one time action, you can use .dump and .read.
Dump the table my_table from old_db.sqlite
c:\sqlite>sqlite3.exe old_db.sqlite
sqlite> .output mytable_dump.sql
sqlite> .dump my_table
sqlite> .quit
Read the dump into the new_db.sqlite assuming the table there does not exist
c:\sqlite>sqlite3.exe new_db.sqlite
sqlite> .read mytable_dump.sql
Now you have cloned your table.
To do this for whole database, simply leave out the table name in the .dump command.
Bonus: The databases can have different encodings.
Objective-C code for copy Table from a Database to another Database
-(void) createCopyDatabase{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSString *maindbPath = [documentsDir stringByAppendingPathComponent:#"User.sqlite"];;
NSString *newdbPath = [documentsDir stringByAppendingPathComponent:#"User_copy.sqlite"];
NSFileManager *fileManager = [NSFileManager defaultManager];
char *error;
if ([fileManager fileExistsAtPath:newdbPath]) {
[fileManager removeItemAtPath:newdbPath error:nil];
}
sqlite3 *database;
//open database
if (sqlite3_open([newdbPath UTF8String], &database)!=SQLITE_OK) {
NSLog(#"Error to open database");
}
NSString *attachQuery = [NSString stringWithFormat:#"ATTACH DATABASE \"%#\" AS aDB",maindbPath];
sqlite3_exec(database, [attachQuery UTF8String], NULL, NULL, &error);
if (error) {
NSLog(#"Error to Attach = %s",error);
}
//Query for copy Table
NSString *sqlString = #"CREATE TABLE Info AS SELECT * FROM aDB.Info";
sqlite3_exec(database, [sqlString UTF8String], NULL, NULL, &error);
if (error) {
NSLog(#"Error to copy database = %s",error);
}
//Query for copy Table with Where Clause
sqlString = #"CREATE TABLE comments AS SELECT * FROM aDB.comments Where user_name = 'XYZ'";
sqlite3_exec(database, [sqlString UTF8String], NULL, NULL, &error);
if (error) {
NSLog(#"Error to copy database = %s",error);
}
}
The Easiest way to do is through SQLite Studio
If you don't have download from https://download.cnet.com/SQLiteStudio/3000-10254_4-75836135.html
Steps:
1.Add both the databases.
2.Click View tab and then databases as shown in the picture.
3.Right click the table you want to copy and copy it.
Paste the table after right clicking the database where you want to paste.
Now you're done
First scenario: DB1.sqlite and DB2.sqlite have the same table(t1), but DB1 is more "up to date" than DB2. If it's small, drop the table from DB2 and recreate it with the data:
> DROP TABLE IF EXISTS db2.t1; CREATE TABLE db2.t1 AS SELECT * FROM db1.t1;
Second scenario: If it's a large table, you may be better off with an INSERT if not exists type solution. If you have a Unique Key column it's more straight forward, otherwise you'd need to use a combination of fields (maybe every field) and at some point it's still faster to just drop and re-create the table; it's always more straight forward (less thinking required).
THE SETUP: open SQLite without a DB which creates a temporary in memory main database, then attach DB1.sqlite and DB2.sqlite
> sqlite3
sqlite> ATTACH "DB1.sqlite" AS db1
sqlite> ATTACH "DB2.sqlite" AS db2
and use .databases to see the attached databases and their files.
sqlite> .databases
main:
db1: /db/DB1.sqlite
db2: /db/DB2.sqlite
I needed to move data from a sql server compact database to sqlite, so using sql server 2008 you can right click on the table and select 'Script Table To' and then 'Data to Inserts'. Copy the insert statements remove the 'GO' statements and it executed successfully when applied to the sqlite database using the 'DB Browser for Sqlite' app.
If you use DB Browser for SQLite, you can copy the table from one db to another in following steps:
Open two instances of the app and load the source db and target db side by side.
If the target db does not have the table, "Copy Create Statement" from the source db and then paste the sql statement in "Execute SQL" tab and run the sql to create the table.
In the source db, export the table as a CSV file.
In the target db, import the CSV file to the table with the same table name. The app will ask you do you want to import the data to the existing table, click yes. Done.