Mysql workbench compare two tables sql

mysql workbench compare two tables sql

Unlike SQL, MySQL does not consider the Outer Join as a separate Join type. To get the same results as the Outer Join, you need to join the Left. Once you run the Compare Database Wizard, you will be able to see which tables are different between Source and Destination, Tables which exists in Source and. Compare two database schemas - WbSchemaDiff WbSchemaDiff analyzes two schemas (or a list of tables) and outputs the differences between those schemas as. STORM AND THUNDERBIRD 2 PACK

Workbench provides a user-friendly GUI in which you can create and maintain databases. Choose the database server you have access to and connect to it. You can set the default collation , such as Latin1 or UTF8. However, it is not mandatory. If you do not define the collation, it automatically uses what is assigned to the server instance. Click Apply. Workbench lets you revise the SQL script that will be applied to the database. If everything is in order, click Apply once more.

Note: Make sure the statements you are about to apply work for your database. Next, the output will inform you that the SQL script was successfully applied to the database. With this step, you have created a database schema. Close the SQL script and start working on your table. The first item in the expanded menu should be Tables. Right-click the item and select Create Table. Hover the mouse over the table.

Three 3 light gray icons appear on the right side. The last one is the table icon. Click that little table icon to load the table. This action prompts a new window in which the upper left section shows the MySQL statement, while the lower section shows the data rows currently with null values.

WbDataDiff requires that all involved tables have a primary key defined. If a table does not have a primary key, WbDataDiff will stop the processing. To improve performance a bit , the rows are retrieved in chunks from the target table by dynamically constructing a WHERE clause for the rows that were retrieved from the reference table. The chunk size can be controlled using the property workbench. This is a conservative setting to avoid problems with long SQL statements when processing tables that have a PK with multiple columns.

If you know that your primary keys consist only of a single column and the values won't be too long, you can increase the chunk size, possibly increasing the performance when generating the SQL statements. Sorts the generated scripts in order to respect foreign key dependencies for deleting and inserting rows. Note that enabling this option will result in additional overhead reading the target table's data and will slow down the overal comparison speed.

The encoding to be used for the SQL scripts. The default depends on your operating system. It will be displayed when you run WbDataDiff without any parameters. You can overwrite the platform default with the property workbench. Valid values: jdbc , ansi , dbms , default. For a detailed description of the possible values, please refer to the WbExport command. Controls if "identity" or "auto increment" columns are included in the generated generated SQL statements.

This overwrites the global option that controls this behaviour. With this parameter you can define a list of column names that should not be considered when comparing data. You can e. With this parameter alternate keys can be defined for the tables that are compared. To specify alternate keys for multiple tables, the parameter must be repeated for each table.

Note that each value has to be enclosed in either single or double quotes to mask the equals sign embedded in the parameter value. Once an alternate primary key has been defined, the primary key columns defined on the tables are ignored.

To avoid this, set the parameter -excludeRealPK to true. This parameter controls the usage of the real PK columns in case alternate PK columns are defined. This parameter has no effect if no alternate keys were specified using the -alternateKey option. Control the update frequence in the status bar when running in GUI mode. The default is every 10th row is reported. To disable the display of the progress specify a value of 0 zero or the value false.

Comparing databases Prev Next. Comparing databases. Compare two database schemas - WbSchemaDiff Compare data across databases - WbDataDiff. Compare two database schemas - WbSchemaDiff. Parameter Description -referenceProfile The name of the connection profile for the reference connection. The connection is specified with a comma separated list of key value pairs: username - the username for the connection password - the password for the connection url - the JDBC URL driver - the class name for the JDBC driver.

This not required if a driver for the specified class is already configured. WbSchemaDiff Examples. If the profile's name is unique you can omit this parameter -referenceConnection Allows to specify a full connection definition as a single parameter and thus does not require a pre-defined connection profile.

WbDataDiff Examples. Prev Next Copy data across databases Home Search data and code in the database. The name of the connection profile for the reference connection. If the name of your reference profile is not unique across all profiles, you will need to specify the group in which the profile is located with this parameter.

This not required if a driver for the specified class is already configured e. If the name of your target profile is not unique across all profiles, you will need to specify the group in which the profile is located with this parameter.

The filename of the output file. If this is not supplied the output will be written to the message area. A comma separated list of tables that are the reference tables, to be checked. Compare all tables from the specified schema user. A schema in the target connection to be compared to the tables from the reference schema.

A comma separated list of tables or views that should not be compared. The encoding to be used for the XML file. The default is UTF Select whether primary key constraint definitions should be compared as well. The default is true. Select whether foreign key constraint definitions should be compared as well.

Select whether table grants should be compared as well. The default is false. Select whether table triggers are compared as well. The default value is true. Select whether views should also be compared.

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