![]() ![]() It supports interactive and noninteractive use. To import our saved books.sql file created earlier, we’d use many of the same flags and much the same syntax. mysql is a simple SQL shell with input line editing capabilities. o, -one-database Ignore statements except those that occur while the default database is the one named at the command line. In most cases, importing is just a matter of passing virtually identical options to the mysqlimport command. Now that you’ve learned how to export a backup of a MySQL database, we’ll explore how to reverse the process and import the backup into an existing database.Īs you might imagine, to compliment the mysqldump command used for exporting, there is a similar mysqlimport command for importing. If you need the ability to export (and later recreate) one more more databases, read up on the -databases flag in the official documentation. Inline comments useful to explain variables or conditions or a small piece of SQL code with in the query. The syntax / / also can be used to add inline comments and also can be use to write single line comments. If youd like to write a comment spanning multiple lines, you can use - at the beginning of each comment line, just as in the example: - product names along with the number of items. A comment is a programmer-readable explanation or annotation placed in the SQL queries. To write block of comments in multiple lines in MySQL you can use syntax / /. After the -, you can write any comment youd like as long as its in one line. Instead, by default, only actual tables (and their respective data) are saved and thus will be prepared for later import using this file. You can write single-line comments in SQL using. sql suffix (which is completely optional but advisable) in the appropriate directory.īy default, mysqldump will not save commands which attempt to modify the existence of the actual database. MySQL multi-line comments are enclosed within / and / end-of-line comments begins with - (followed by a space) or. Single line Comment Single line comment at the end of a line Single line comments to ignore statement Multi line comment Multi line comment to ignore many statement. If you need to change your root (or any other) password in the database, then follow this tutorial on changing a password for MySQL via the command line.$ mysqldump -u book_admin -p books > ~/backup/database/books.sqlĪfter entering our password when prompted above, this command then creates our backup file with a. I want this line to be part of the same logical line while having newlines in the input source code. The following command starts another mysql container instance and. ![]() ![]() Enter your current root password to complete the login. CREATE TABLE foo ( bar VARCHAR(63) NOT NULL COMMENT This is the beginning of a very long comment that goes on and on and on. On Windows, click Start, All Programs, MySQL, MySQL 5.7 Command Line Client (or MySQL 8.0 Command Line Client, respectively). Connect to MySQL from the MySQL command line client. Select all table rows starting with 'a' Select all table rows ending with 'a' Select all table rows that have 'or' in any position Select all table rows that have 'r' in the second position Select all table rows that starts with 'a' and ends with 'o' Select all table rows that starts with 'a' and are at least 3 characters in length. In this case, I’ve specified the user root with the -u flag, and then used the -p flag so MySQL prompts for a password. I’ll be working from a Liquid Web Core Managed CentOS 7 server, and I’ll be logged in as root.įirst we’ll login to the MySQL server from the command line with the following command:.These instructions are intended for showing (listing) all MySQL databases via the command line.
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