MySQL dump by query

问题:

Is it possible to do mysqldump by single SQL query?

I mean to dump the whole database, like phpmyadmin does when you do export to SQL

回答1:

not mysqldump, but mysql cli...

mysql -e "select * from myTable" -u myuser -pxxxxxxxxx mydatabase 

you can redirect it out to a file if you want :

mysql -e "select * from myTable" -u myuser -pxxxxxxxx mydatabase > mydumpfile.txt 

Update: Original post asked if he could dump from the database by query. What he asked and what he meant were different. He really wanted to just mysqldump all tables.

mysqldump --tables myTable --where="id 

回答2:

This should work

mysqldump --databases X --tables Y --where="1 limit 1000000" 

回答3:

You can dump a query as csv like this:

SELECT * from myTable INTO OUTFILE '/tmp/querydump.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' 

回答4:

Dump a table using a where query:

mysqldump mydatabase mytable --where="mycolumn = myvalue" --no-create-info > data.sql 

Dump an entire table:

mysqldump mydatabase mytable > data.sql 

Notes:

• Replace mydatabase, mytable, and the where statement with your desired values.
• By default, mysqldump will include DROP TABLE and CREATE TABLE statements in its output. Therefore, if you wish to not delete all the data in your table when restoring from the saved data file, make sure you use the --no-create-info option.
• You may need to add the appropriate -h, -u, and -p options to the example commands above in order to specify your desired database host, user, and password, respectively.

回答5:

You could use --where option on mysqldump to produce an output that you are waiting for:

mysqldump -u root -p test t1 --where="1=1 limit 100" > arquivo.sql 

At most 100 rows from test.t1 will be dumped from database table.

Cheers, WB

回答6:

Combining much of above here is my real practical example, selecting records based on both meterid & timestamp. I have needed this command for years. Executes really quickly.

mysqldump -uuser -ppassword main_dbo trHourly --where="MeterID =5406 AND TIMESTAMP 5406.sql 

回答7:

MySQL Workbench also has this feature neatly in the GUI. Simply run a query, click the save icon next to Export/Import:

Then choose "SQL INSERT statements (*.sql)" in the list.

Enter a name, click save, confirm the table name and you will have your dump file.

回答8:

If you want to export your last n amount of records into a file, you can run the following:

mysqldump -u user -p -h localhost --where "1=1 ORDER BY id DESC LIMIT 100" database table > export_file.sql 

The above will save the last 100 records into export_file.sql, assuming the table you're exporting from has an auto-incremented id column.

You will need to alter the user, localhost, database and table values. You may optionally alter the id column and export file name.

回答9:

mysql Export the query results command line：

mysql -h120.26.133.63 -umiyadb -proot123 miya -e "select * from user where id=1" > mydumpfile.txt 

文章来源: MySQL dump by query