I have a mysql database with lots of tables and records in it. I want to get the list of queries which were used to create tables , insert records etc in that mysqldb. Is it possible. I have seen it in Oracle sql developer. If we click on the table we can view the queries which we have used, for DDL. How to do that in msyql. I am using mysql command line client.
You could use the mysqldump-utility for that
In Linux:
mysqldump my_database_name >dumpfile.sql
Related
I have table which has a few data.
name score
1 AAA 100
2 BBB 98
3 CCC 85
Now I want to make the insert sentence such as
insert into pepolescore(name,score) VALUE("CCC",85)
automatically.
Is there any command to do this or any function ? by mysql commandline or phpmyadmin.
MySQL queries can address another schema on the same MySQL Server instance by using qualified table names. See https://dev.mysql.com/doc/refman/8.0/en/identifier-qualifiers.html
But this does not work if the tables are on separate MySQL Servers. A given SQL query can only address schemas on the same server.
Here are a few workarounds:
Use mysqldump to export data from one table and then use mysql to import it to the other table on the other instance. You need to be careful not to let mysqldump output the DROP TABLE command, so read about the options here: https://dev.mysql.com/doc/refman/8.0/en/mysqldump.html
MySQL supports a table engine called FEDERATED, where a table can function as a sort of proxy to a table on another MySQL Server. Then you can use INSERT ... SELECT syntax as if the tables were co-located on the same MySQL Server. The Federated engine has limitations, so read https://dev.mysql.com/doc/refman/8.0/en/federated-storage-engine.html and its subsections to learn more.
Use a community tool such as pt-archiver to copy data from one MySQL instance to the other. Read the manual to learn more: https://docs.percona.com/percona-toolkit/pt-archiver.html
Write your own custom code in a client application. Create two connections, one for each MySQL Server. Fetch query results from the first server, and store the resulting rows in variables in your application. Then use these rows as the tuples to insert using the second connection to the other MySQL Server. This involves writing more code, but you get a lot of flexibility.
i've a MSSQL database and trying to migrate to MySQL database.. the problem is when I using MySQL WorkBench, some table records in my MSSQL database is not migrated (there is an error and MySQL Workbench not responding).. is there any tools to export MSSQL table records into SQL file that compatible to be executed in MySQL?
Both T-SQL and MySQL and support VALUES clause. So, right click on the database and select Generate scripts from Tasks:
Then you can choose objects:
and then make sure you have selected to get the data, too:
You can even get the schema and change it a little bit to match the MySQL syntax.
For small amount of data this is pretty cool. If you are exporting large tables it will be better to use another tool. For example, using bcp you can export your data in CSV format and then import it in the MySQL database.
I am using MySQL v5.1.
I am developing a Rails app. and writing a ruby script to copy database. So far, I have got an array of table names, the number of tables is 2090. I need to create all the tables in a new database, my code looks like:
#"table_names" is fetched by execute 'show tables' SQL commands
table_names.each { |tbl_name|
ActiveRecord::Base.connection.execute("CREATE TABLE #{new_db_name}.#{tbl_name} LIKE #{old_db_name}.#{tbl_name}")
}
This code works, but it took a long time to complete, because the code has to execute the CREATE TABLE command one by one and there are 2090 tables to create.
I am wondering is there any way to have bulk creating of tables (like bulk inserting of data) in SQL to save the time? If not, how can I improve the speed of creating the tables? That's copy all 2090 tables from one database to another.
P.S. I don't want to hard code all 2090 table names in SQL file.
Simplest method in mysql is to do a mysqldump of the database in question, then restore it to the new database, e.g:
mysql_dump -pPASSWORD -uUSERNAME name_of_db > name_of_db.sql
mysql -pPASSWORD -uUSERNAME name_of_db < name_of_db.sql
the dump file will contain all the necessary DDL/DML queries to recreate the database, plus disabling foreign keys and whatnot so that the dump can be loaded without causing any foreign key problems while the restored DB is in a halfway state.
Sounds like what you're looking for is a SchemaCompare tool as opposed to a DataCompare tool. This is built into Visual Studio for SQL. This tool will do that: http://toadformysql.com/index.jspa
I am using phpMyAdmin to create database tables and fields. I have 100's of tables in a single database. Now I need to make the same on few more servers.
I feel it's too hard to write SQL queries to create that database. Is there any reverse process to generate an SQL query file from phpMyAdmin or anyother tool? I want to create a database in a GUI, and I need the SQL query for my database. Is there any tool to generate it automatically?
If I understood you correctly, you want to export a database (with many tables) using phpMyAdmin, and then import it and use it on another server.
Yes. You can do that.
Select the database on the left-hand side in phpMyAdmin and then:
Export -> Select All Tables -> Adjust Options -> Go.
You are going to get <youdatabasename>.sql file, with all the table definitions inside. Then you can import it in another phpMyAdmin or other database handler.
You can use mysqldump to do this. Then --nodata switch should do what you want.
I would like to select data from a second MySQL database in order to migrate data from one server to another.
I'm looking for syntax like
SELECT * FROM username:password#serverip.databaseName.tableName
Is this possible? I would be able to do this in Microsoft SQL Server using linked servers, so I'm assuming it's possible in MySQL as well.
You can create a table using FEDERATED storage engine:
CREATE TABLE tableName (id INT NOT NULL, …)
ENGINE=FEDERATED
CONNECTION='mysql://username:password#serverip/databaseName/tableName'
SELECT *
FROM tableName
Basically, it will serve as a view over the remote tableName.
There are generally two approaches you can take, although neither of them sound like what you're after:
Use replication and set up a master/slave relationship between the two databases.
Simply dump the data (using the command line mysqldump tool) from the 1st database and import it into the 2nd.
However, both of these will ultimately migrate all of the data (i.e.: not a subset), although you can specify specific table(s) via mysqldump. Additionally, if you use the mysqldump approach and you're not using InnoDB you'll need to ensure that the source database isn't in use (i.e.: has integrity) when the dump is created.
You can't do this directly, but as someone else alluded to in a comment, you can use mysqldump to export the contents of a table as a SQL script.
At that point you could run the script on the new server to create the table, or if more manipulation of the data is required, import that data into a table with a different name on the new server, then write a query to copy the data from there.