When using the mysqldump command, the option -d or --no-data is employed to generate a dump of MySQL database schema without including the actual data rows. This is particularly useful when you need to replicate the structure of a database or when transferring the schema to another system without the need for data content.
Here are several examples demonstrating the use of mysqldump with the --no-data option:
Example 1: Dump the schema of a specific database without data.
mysqldump -d -u username -p database_name
This command will prompt for the MySQL user’s password and then generate a SQL dump file containing only the schema (tables, indexes, and other structural definitions) of the specified database.
Example 2: Dump multiple databases’ schemas without data.
mysqldump -d -u username -p --databases db1 db2 db3
In this case, the command dumps the schema for databases db1, db2, and db3 without including any data rows.
Example 3: Dump all databases’ schemas without data.
mysqldump -d -u username -p --all-databases
This command will dump the schemas of all databases on the MySQL server without including data.
Example 4: Dump a specific table’s schema without data.
mysqldump -d -u username -p database_name table_name
It generates a schema dump for table_name within database_name without including any row data.
Example 5: Dump schema with table structure only.
mysqldump -d -u username -p --no-create-info --no-data database_name
This command omits both the creation and data insertion statements, resulting in a schema dump that includes only table structures.
Example 6: Dump schema excluding views and triggers.
mysqldump -d -u username -p --ignore-table=database_name.view_name --skip-triggers database_name
Here, the command excludes the specified view and skips triggers while dumping the schema of database_name.
Example 7: Dump schema including stored procedures and functions.
mysqldump -d -u username -p --routines database_name
This command includes the stored procedures and functions along with the schema dump of database_name.
Example 8: Dump schema excluding stored procedures.
mysqldump -d -u username -p --no-routines database_name
It generates a schema dump excluding any stored procedures or functions from database_name.
Example 9: Dump schema with extended insert syntax.
mysqldump -d -u username -p --extended-insert=FALSE database_name
This command modifies the insert statements in the schema dump to use one insert statement per row.
Example 10: Dump schema with a specific character set.
mysqldump -d -u username -p --default-character-set=utf8 database_name
It sets the default character set to UTF-8 when generating the schema dump for database_name.
To verify whether the mysqldump command executed successfully and produced the desired output, you can check for the existence of the generated dump file. Typically, the output file will be named based on the database or table name you specified, followed by a SQL extension (e.g., database_name.sql). Additionally, you can open the file using a text editor or MySQL client to inspect its contents, ensuring that it contains only schema definitions without any data rows.
Also check similar articles.
Omitting Table Creation Info in mysqldump Output
Suppressing CREATE DATABASE Statements in mysqldump
Disabling Autocommit in mysqldump Output
Setting Network Buffer Length in mysqldump
Setting Maximum Allowed Packet Size in mysqldump
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