I'm learning SQL - working my way through a book.
I have mysql client set up and running. I have added and created databases and tables manually, no more than about ten records and fields.
I'm now working through a chapter all about selecting records based on criteria.
I would therefore like to import a larger database to play around with. I have downloaded the "world.sql" file from mysql.com. This file contains all of the worlds cities and associated data such as population - a good table to play around with.
I have downloaded the file to my desktop but I do not know how to actually add to a database in order to use.
I created a new database in the terminal called "world". I now need to import the sql file to this database but do not know how to?
What commands am I looking for here?
Call mysql from the shell and pipe the world.sql file to it:
$ mysql -uYOURUSER -pYOURPASSWORD < world.sql
/Applications/MAMP/Library/bin/mysql -u root -p {db_name} < {path_to_file/file.sql}
OR
/Applications/MAMP/Library/bin/mysql -u root -p
enter password then
use db_name
then
source path_to_file/file.sql
if you get foreign key error than first use following command before import
SET FOREIGN_KEY_CHECKS=0;
Then
source path_to_file/file.sql
Related
I'm trying to import existing database file into an empty SQL database with the following command:
mysql -u username -p'password' db_name < dbfile.sql
but I get following Error:
ERROR 1146 (42S02) at line 1: Table 'db_name.oc_address' doesn't exist
I know that oc_address is a table name inside the SQL file, but I don't know what to do to import it correctly, I searched the web and also stack-overflow, found nothing on this error.
Download the actual opencart zip file
https://www.opencart.com/index.php?route=cms/download/download&download_id=62
Unzip it
open folder
\upload\install
and
run opencart.sql
if you have installed extensions that have need their own sql, you have to run their sql as well
After that run you backup file
To export an entire database and then load it into another server, your best bet is to use the mysqldump command line utility. Its export files contain the data definition language (tables, views, all that) for the database as well as the data.
You can also get it to export just the definitions.
mysqldump --no-data -u username -p'password' db_name > opencartddl.sql
Then you can import that file first, then your data file.
Or, you may be able to stand up a new, empty, Opencart instance and use its UI to import your data.
It's probably wise to avoid trying to write replacement DDL yourself if you can get a tool like mysqldump to do it.
So I wanted to format my system and I had a lot of works that I have done on my localhost that involves databases. I followed the normal way of backing up the database by exporting it into an SQL file but I think I made a mess by making a mistake of backing up everything in one SQL file (I mean the whole localhost was exported to just one SQL file).
The problem now is: when I try to import the backed up file I mean the (localhost.sql), I get an error like
tables already exist.
information_schema
performance_schema
an every other tables that comes with Xampp, which has been preventing me from importing the database.
These tables are the phpmyadmin tables that came with Xampp. I have been trying to get past this for days.
My question now is that can I extract different databases from the same compiled SQL database file?
To import a database you can do following things:
mysql -u username -p database_name < /path/to/database.sql
From within mysql:
mysql> use database_name;
mysql> source database.sql;
The error is quite self-explanatory. The tables information_schema and performance_schema are already in the MySQL server instance that you are trying to import to.
Both of these databases are default in MySQL, so it is strange that you would be trying to import these into another MySQL installation. The basic syntax to create a .sql file to import from the command line is:
$ mysqldump -u [username] -p [database name] > sqlfile.sql
Or for multiple databases:
$ mysqldump --databases db1 db2 db3 > sqlfile.sql
Then to import them into another MySQL installation:
$ mysql -u [username] -p [database name] < sqlfile.sql
If the database already exists in MySQL then you need to do:
$ mysqlimport -u [username] -p [database name] sqlfile.sql
This seems to be the command you want to use, however I have never replaced the information_schema or performance_schema databases, so I'm unsure if this will cripple your MySQL installation or not.
So an example would be:
$ mysqldump -uDonglecow -p myDatabase > myDatabase.sql
$ mysql -uDonglecow -p myDatabase < myDatabase.sql
Remember not to provide a password on the command line, as this will be visible in plain text in the command history.
The point the previous responders seem to be missing is that the dump file localhost.sql when fed into mysql using
% mysql -u [username] -p [databasename] < localhost.sql
generates multiple databases so specifying a single databasename on the command line is illogical.
I had this problem and my solution was to not specify [databasename] on the command line and instead run:
% mysql -u [username] -p < localhost.sql
which works.
Actually it doesn't work right away because of previous attempts
which did create some structure inside mysql, and those bits in localhost.sql
make mysql complain because they already exist from the first time around, so
now they can't be created on the second time around.
The solution to THAT is to manually edit localhost.sql with modifications like
INSERT IGNORE for INSERT (so it doesn't re-insert the same stuff, nor complain),
CREATE DATABASE IF NOT EXISTS for CREATE DATABASE,
CREATE TABLE IF NOT EXISTS for CREATE TABLE,
and to delete ALTER TABLE commands entirely if they generate errors because by then
they've already been executed ((and INSERTs and CREATEs perhaps too for the same reasons). You can check the tables with DESCRIBE TABLE and SELECT commands to make sure that the ALTERations, etc. have taken hold, for confidence.
My own localhost.sql file was 300M which my favorite editor emacs complained about, so I had to pull out bits using
% head -n 20000 localhost.sql | tail -n 10000 > 2nd_10k_lines.sql
and go through it 10k lines at a time. It wasn't too hard because drupal was responsible for an enormous amount, the vast majority, of junk in there, and I didn't want to keep any of that, so I could carve away enormous chunks easily.
unzip -p /pathoffile/database_file.zip | mysql -uusername -p databsename;
Best way to import database in localhost has simple 5 steps:
zip sql file first to compress databse size.
go to termianl.
create empty database.
Run Command unzip databse With Import database: unzip -p /pathoffile/database_file.zip | mysql -uusername -p databsename;
Enter Password
I don't know much about MySQL at all. But I am trying to reverse engineer a MySQL database using Visio. I know what steps I should take to do this, but I can't get my database to show in the 'Databases' section (as below):
How do I create the MySQL database using the .SQL file and get it to show up in this list? I have tried this code:
mysql -u username -p password database_name < filename.sql
using my own credentials of course. But that doesn't seem to work. In what folder should the .SQL file be placed if this statement is to work?
1) Create a file "filename.sql"
2) Create a database in your DB in which you want to import this file.
3) From command-prompt/terminal, move to the directory where you have created a "filename.sql".
4) Run the command: mysql -u username -p password database_name < filename.sql. (You can also give the proper path of your file and run this command from anywhere). It might be the case that you don't have a password set for MySQL. If so, mysql -u username database_name < filename.sql will also work.
In your case if you have created a database with name ojs and also created a file with name ojs.sql in C: drive then run the following command:
Edit: Put the path inside quotes.
mysql -u username -p password ojs < "C:\ojs.sql"
There is another way of importing tables in mysql. You can do it this way as well:
1) Connect your database
2) Type command "use ojs;"
3) Type command "source C:/ojs.sql"
Most MySQL SQL files that create databases create the database 'on-the-fly', so you typically needn't do anything except:
log-in
mysql -u [username] -p[password]
(Note: make sure you do NOT include a space (' ') character between the -p and the [password].
MySQL will think that [password] is the name of the database you want to connect to.
The 'general' log-in (above) does not assume you want to connect to any particular schema.)
source the file (do not use quotes around filename)
mysql> source [database_creation_file].sql
you can simply do it using mysql workbench
1> create a new query tab
2> CREATE DATABASE database_name;
3> USE database_name;
4> open the filename.sql file and execute it ctrl + shift + enter
5> all the tables in the filename.sql are created
To create a MySQL database using a SQL file, you can follow these steps:
Log in to your MySQL server using the mysql command-line tool and the appropriate credentials.
Use the CREATE DATABASE command to create a new database with the desired name:
CREATE DATABASE database_name;
Use the USE command to switch to the newly created database:
USE database_name;
Use the SOURCE command to import the SQL file into the database:
SOURCE path/to/sql/file;
The database will now be created and populated with the data from the SQL file. You can verify this by running some SQL queries against the database.
It's important to note that this process assumes that the SQL file contains valid SQL statements compatible with the version of MySQL you are using. If the SQL file contains any errors or unsupported statements, they will be displayed in the mysql command-line tool, and the import process will be interrupted.
I have a .sql file with some database backups inside. Now I want to restore them back to MySQL. How can I this using command line of MySqL please? I found this:
mysql -u username -p -h localhost database_name < dumpfile.sql
but I don't know what username should be, what database_name should be and how I could browse to a .sql file in another folder.
You need to replace username with your database username and it will prompt you for a password. If the dump file has the "create database [name];" and "use [name];" instructions then you dont need to specify the database_name attribute.
To pull the .sql from another folder you just need to specify the path (/home/user/Downloads/file.sql, for example).
You could also try downloading mysql administrator from the mysql website.
Check this link too
http://www.techiecorner.com/31/how-to-restore-mysql-database-from-sql-dump-file/
Redirecting a .sql file into the MySQL CLI works because that's the format that mysqldump produces. And people usually call mysqldump to dump a whole database, so they get one file afterwards.
The username and password are dependant on what's been setup on the database instance you want to reload the data in to. On a clean, empty install, the MySQL root user will work (and probably won't have a password). On an established install, you should find an appropriate user. The user you use will need substantial permissions as it needs to create and write to tables.
The .sql file may have CREATE database and USE database statements near the top. If this is present, then make sure that database does not exist before you pipe the file in. If not, you will need to find out what name is expected by whatever program will be using the database.
As for piping another file in in a different directory, this is simple shell notation. The < filename notation fully supports paths so you can do < some/other/path/filename.sql or < ~/sql/filename.sql, for example. (Note that I've assumed you're using a Unix shell.)
You can use cmd
type cmd run as adminstration (C:\windows\system32>)
give path of mysql of bin folder (C:\windows\system32>
cd `C:\xampp\mysql\bin)
C:\xampp\mysql\bin>mysql -u username -p -h localhost database_name
type-> use database_name
type-> source F:/example.sql
I have a MySQL file, db.sql. I have tried to import it using:
mysql -uroot -p[password] db < db.sql
All I get is a listing of mysql commands, or I get a syntax error. The weird thing is I used this file last week and, as far as I know, I'm doing it the same way.
I create the database, then in command line enter the above but it's not working. I've tried being inside mysql and just at command line and nothing seems to be working.
Is there something I should be doing differently in windows or MySQL5? I don't know how the heck I got it to work the first time...
TIA
Try this instead:
mysql -u root -p
(prompts for password)
use db;
source db.sql
I found out it is different to run this command from Windows Command Line (cmd.exe) and Windows PowerShell.
Using CMD.exe the command works okay, but in PowerShell I get this error:
mysql -uroot exampledb < exampledb.sql
The '<' operator is reserved for future use.
Not sure if your example was a typo or not, but for starters you need to have a space in between your flags and their values, roughly like this:
mysql -u root -p [password] db < db.sql
If you are already logged in the try this it will be very useful, but depend upon the MySQL version, it works on MySQL 5.0
For log in if you are not already logged in.
mysql>[your password]
Other wise, use the database to which you want to import the SQLDump file by command.
mysql>use [your database name]
And then give source the database Dump file path as blow command(If not works the copy Dump database file to the bin folder where the MySQL installed for eg. "C:/programfiles/mysql/mqlserver5.0/bin")
mysql> source [dataBasePath+name.sql or dataBaseName.sql]
I've been using PHP script called "BigDump":
http://www.ozerov.de/bigdump.php
This perfectly works
mysql>[your password]
Other wise, use the database to which you want to import the SQLDump file by command.
mysql>use [your database name]
And then give source the database Dump file path as blow command(If not works the copy Dump database file to the bin folder where the MySQL installed for eg. "C:/programfiles/mysql/mqlserver5.0/bin")
mysql> source [dataBasePath+name.sql or dataBaseName.sql]EG: source C:.....sql
I am using mysql server 5.5
In Windows PowerShell, you can pipe in the contents like so:
Get-Content db.sql | mysql -u root -p [password]