I am trying to create a table on my local machine which has the same description as some other table on a remote machine. I just want to create the table with same columns, don't worry about the row data.
The table has around 150 columns, so its very tedious to write the CREATE TABLE command. Is there an elegant way of doing this?
Are you referring to something like:
SHOW CREATE TABLE table_name;
which shows an sql query on how to create the certain table.
You can get the description of your table on host1 with DESCRIBE by calling something like
DESCRIBE "myTable";
This will need some manual efforts to build up the CREATE TABLE-command, but has the advantage to get all important things on one view.
Anothe way would be to unload the structur of you database of host 1 you can use mysql_dump. To do so call mysql_dump similar to
mysql_dump -d [options_like_user_and_host] databasename tabelname;
You will get a file which nearly directly can be used for your host 2. Atttention: Some relations e.g. to other tables might not be included.
You can use mysqldump to export database table structure only. Use -d or --no-data to achieve it. Official document. For example
mysqldump -d -h hostname -u yourmysqlusername -p databasename > tablestruc.sql
If your local machine is accessible from remote, then change the hostname and execute this command from remote machine.
Related
I've seen a few posts about insert a table into another table (with the same columns) but i'm having trouble figuring out how to do this across different databases. I see that you reference the database first with the dot operator and then the table ie. database.table but the databases are completely separate instances (separate login credentials etc.) when i reference one database the another database doesn't recognize it. What would be the best way to accomplish what it is i'm trying to do?
I running the DBs on AWS if that helps
once logged in, there is no way to connect to another database (as far as I know - please correct me if I'm wrong). so you have to have to export your data first and then import it.
mysqldump is the tool for exporting, e.g. mysqldump -h HOST -u USER -p database table > export.sql
import it then via e.g. mysql -h HOST -u USER -p database table < export.sql
I have a MySQL database say test. It contains 10 tables. I know I can do describe <table_name> to get skeleton of that table. But I have to do that for each table individually.
This is my problem. Any query or script I can write to get the skeleton of all those tables at time?
Try Like this
SELECT * FROM information_schema.columns Where TABLE_SCHEMA='test';
mysqldump can be told to skip data and dump only table schema.
mysqldump --no-data test
Use options -u <user> to connect as <user> and -p to ask for password. Maybe you also want --compact to be less verbose and possibly other. Many adjustments to the contents can be made using other options.
There are certain tables, that does not often change:
Country (ID / Name / Abbreviations)
IPs by Countries (ID / IP Range)
During the development, every time I modify something on the database I have to preload these tables manually into the newly created database.
Is there any way to query these datas automatically to the tables at every Forward Engineer process in MySQL Workbench?
Each table in a MySQL Workbench model file has a section called "Inserts". Open a table in the table editor and click the tab labeled "Inserts". There you can add as many records as you wish and this data is applied when you forward engineer your model.
you can simply create a import/export script with the tables you want or even the whole database. e.g.:
mysqldump -hHOST_FROM -u -p database_name table_name --no-create-db --no-create-info mydb | mysql -hHOST_TO -u -p database_name
BTW: "I choose a lazy person to do a hard job. Because a lazy person will find an easy way to do it" - Bill Gates.
I have a mysql dump created with mysqldump that holds all the tables in my database and all their data. However I only want to restore two tables. (lets call them kittens and kittens_votes)
How would I restore those two tables without restoring the entire database?
Well, you have three main options.
You can manually find the SQL statements in the file relating to the backed up tables and copy them manually. This has the advantage of being simple, but for large backups it's impractical.
Restore the database to a temporary database. Basically, create a new db, restore it to that db, and then copy the data from there to the old one. This will work well only if you're doing single database backups (If there's no CREATE DATABASE command(s) in the backup file).
Restore the database to a new database server, and copy from there. This works well if you take full server backups as opposed to single database backups.
Which one you choose will depend upon the exact situation (including how much data you have)...
You can parse out CREATE TABLE kittens|kitten_votes AND INSERT INTO ... using regexp, for example, and only execute these statements. As far as I know, there's no other way to "partially restore" from dump.
Open the .sql file and copy the insert statements for the tables you want.
create a new user with access to only those 2 tables. Now restore the DB with -f (force) option that will ignore the failed statements and execute only those statements it has permission to.
What you want is a "Single Table Restore"
http://hashmysql.org/wiki/Single_table_restore
A few options are outlined above ... However the one which worked for me was:
Create a new DB
$ mysql -u root -p CREATE DATABASE temp_db
Insert the .sql file ( the one with the desired table ) into the new DB
$ mysql -u root -p temp_db < ~/full/path/to/your_database_file.sql
dump the desired table
$ mysqldump -u root -p temp_db awesome_single_table > ~/awesome_single_table.sql
import desired table
$ mysql -u root -p original_database < ~/awesome_single_table.sql
Then delete the temp_db and you're all golden!
Hi I use mysql administrator and have restored backup files (backup.sql). I would like to use restore the structure without data and it is not giving me an option to do so. I understand phpadmin provides this. I can not use this however. Any one can tell me an easy way?
Dump database structure only:
cat backup.sql | grep -v ^INSERT | mysql -u $USER -p
This will execute everything in the backup.sql file except the INSERT lines that would have populated the tables. After running this you should have your full table structure along with any stored procedures / views / etc. that were in the original databse, but your tables will all be empty.
You can change the ENGINE to BLACKHOLE in the dump using sed
cat backup.sql | sed 's/ENGINE=(MYISAM|INNODB)/ENGINE=BLACKHOLE/g' > backup2.sql
This engine will just "swallow" the INSERT statements and the tables will remain empty. Of course you must change the ENGINE again using:
ALTER TABLE `mytable` ENGINE=MYISAM;
IIRC the backup.sql files (if created by mysqldump) are just SQL commands in a text file. Just copy-paste all the "create ..." statements from the beginning of the file, but not the "insert" statements in to another file and "mysql < newfile" you should have the empty database without any data in it.
there is no way to tell the mysql client to skip the INSERT commands. the least-hassle way to do this is run the script as-is and let it load the data, then just TRUNCATE all of the tables.
you can write a script to do the following:
1 : import the dump into a new database.
2 : truncate all the tables with a loop.
3 : export the db again.
4 : now u just have the structure
You can backup you MYSQL database structure with
mysqldump -u username –p -d database_name > backup.sql
(You should not supply password at command line as it leads to security risks.MYSQL will ask for password by default.)