If you plan to do database development with Java and MySQL, the first thing you’ll need to do is configure a database schema. Show
Technically speaking, the first thing to do before you configure a schema is actually install MySQL and the MySQL Workbench. But once those prerequisites are in place, the first database operation you’ll need to perform is schema creation. Why is a database schema required?In enterprise relational databases, schemas act as a top-level organizations structure. A schema typically maps to a single problem domain such as shipping or billing or user preferences. For cloud-native developers who follow the 12-Factor App guidelines, one schema typically maps to a single microservice. Furthermore, most JDBC drivers require a schema name to create a JDBC connection to the database. Schemas and the JDBC URLThe schema is part of the connection URL and the JDBC driver requires it at runtime to figure out which database tables are available for manipulation. Without a database schema, your data-driven apps go nowhere. How to create a database schema in MySQL with the MySQL Workbench Steps to create a schema in MySQLFortunately, it’s not hard to create a database schema in MySQL, especially if you have the MySQL Workbench tool at your disposal. Just follow these steps:
The MySQL workbench executes the required SQL statement under the covers, and the schema is listed in the tool. With the schema created, you can now provide any JDBC drivers, Hibernate config or JPA persistence.xml file the name of the database URL with the schema name attached. That allows your Java programs to connect to the database. Once you’ve created the schema, you can then create database tables, add columns and rows, insert data and perform CRUD operations. Your ability to manipulate relational data is only limited your knowledge of JPA, Hibernate and the JDBC APIs. Summary: in this tutorial, you will learn how to copy table within the same database or from one database to another using CREATE TABLE and SELECT statements. MySQL copy table to a new tableCopying data from an existing table to a new one is very useful in some cases such as backing up data and replicating the production data for testing. To copy data from a table to a new table, you use CREATE TABLE and SELECT statements as follows:
First, MySQL creates a new table with the name indicated in the CREATE TABLE statement. The structure of the new table is defined by the result set of
the To copy partial data from an existing table to the new one, you use WHERE clause in the SELECT statement as follows:
It is very important to check
whether the table you want to create that already exists before creating it. To do so, you use
Note that the statement above just copies the table and its data. It does not copy other database objects such as indexes, primary key constraint, foreign key constraints, triggers, etc., associated with the table. To copy data from one table and also all the dependent objects of the table, you use the following statements:
We need to execute two
statements. The first statement creates a new table MySQL copy table examplesThe following statement copies data from the
We can verify the copy by querying data from the
In cases we want to copy the offices in the US only, we can add the
The following statement gets all data from the
Suppose, we want to copy not only the data but also all database objects associated with the
MySQL copy table to another databaseSometimes, you want to copy a table to a different database. In such cases you use the following statements:
The first statement creates a new table new_table in the destination database (destination_db) by duplicating the existing table (existing_table) from the source database (source_db). The second statements copy data from the existing table in the source database to the new table in the destination database. Let’s see the following example. First, we create a database named testdb using the following statement:
Second, we create the
Third, we copy data from the classimodels.offices table to testdb.offices table.
Let’s verify the data from the
In this tutorial, we have shown you various techniques to copy table within a database and from one database to another.
Was this tutorial helpful? How do I copy data from one schema to another schema in MySQL?Right-click on the database name then select "Tasks" > "Export data..." from the object explorer. 4. Provide authentication and select the source from which you want to copy the data; click "Next".
How do I copy data from one schema to another schema in SQL?In SQL Management studio right click the database that has the source table, select Tasks -> Export data. You will be able to set source and destination server and schema, select the tables you wish to copy and you can have the destination schema create the tables that will be exported.
How do I copy a database schema in MySQL workbench?5 Answers. Open MySQL Workbench.. Create the old server's connection (if you haven't it). Create the new server's connection (if you haven't it). Go to Server Administration and click Manage Import / Export.. Select old server.. Select all schemas in Export to Disk tab.. How do I move data from one table to another in MySQL workbench?The fastest way to copy a table in MySQL:. Right-click the table you want to copy in Database Explorer and select Duplicate Object.. In the dialog that opens, select the destination db.. Select to copy the table data or structure only.. Specify the name of the new table, and click OK.. |