{"id":83749,"date":"2021-07-17T10:33:24","date_gmt":"2021-07-17T10:33:24","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=83749"},"modified":"2026-01-13T06:01:45","modified_gmt":"2026-01-13T06:01:45","slug":"repair-mysql-tables-using-mysqlcheck","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/repair-mysql-tables-using-mysqlcheck\/","title":{"rendered":"How to Repair MySQL Tables Using mysqlcheck"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>Occasionally, you may need to repair corruption in MySQL tables. Corruption in a database and its tables typically happens when a mysqld process gets killed in the middle of an update or write operation. Also, events like unexpected system shutdown, hardware errors, etc. could easily corrupt a database table.<\/p><p>A corrupt table can render the data unreadable. To regain access to the data, you must first try restoring the table from an updated database backup. If it&rsquo;s not possible, you must repair the corrupted table. If your server is running, use the &lsquo;mysqlcheck&rsquo; command to repair all or a specific table.<\/p><p><strong>Note: <\/strong>The mysqlcheck command works when the server is running. If the server is no longer running or has crashed, you may use the <a href=\"https:\/\/www.stellarinfo.com\/blog\/repair-myisam-table-by-using-myisamchk\/\" target=\"_blank\" rel=\"noreferrer noopener\">myisamcheck&nbsp;command to repair a corrupt MyISAM table<\/a>. For recovery of a corrupted InnoDB table, try forcing InnoDB recovery. If nothing works, you may consider repairing the corrupted MySQL tables using a MySQL repair software.<\/p><p>Before repairing the database tables, you must take backup of the tables to prevent data damage.<\/p><h2 class=\"wp-block-heading\" id=\"back-up-data-before-running-repairs\"><strong>Back Up Data Before Running Repairs<\/strong><\/h2><p>To take backup of all the files of your databases, do the following:<\/p><ul class=\"wp-block-list\">\n<li>Log in to your MySQL server and stop the server using the command:<\/li>\n<\/ul><figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>service mysql stop<\/strong><strong><\/strong><\/td><\/tr><\/tbody><\/table><\/figure><ul class=\"wp-block-list\">\n<li>Copy all the files of your database into a new directory by running the below command:<\/li>\n<\/ul><figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>cp -r \/var\/lib\/mysql \/var\/lib\/mysql_backup<\/strong><strong><\/strong><\/td><\/tr><\/tbody><\/table><\/figure><ul class=\"wp-block-list\">\n<li>Now, restart the server:<\/li>\n<\/ul><figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>service mysqld start<\/strong><strong><\/strong><\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"what-is-mysqlcheck-and-when-to-use-it\"><strong>What is mysqlcheck and When to Use It<\/strong><\/h2><p>After backing up the data, begin troubleshooting the corrupted MySQL tables by running the&nbsp;mysqlcheck&nbsp;command. The procedure to repair tables in MySQL database using mysqlcheck is as follows:<\/p><p><strong>Note:<\/strong>&nbsp;In the following steps, replace &lsquo;db_name&rsquo; and &lsquo;tbl_name&rsquo; with the name of your database and table to be repaired.<\/p><h3 class=\"wp-block-heading\" id=\"h-step-1-check-the-mysql-tables-for-corruption\"><strong>Step 1 &ndash; Check Tables for Errors with mysqlcheck<\/strong><\/h3><p>Before you repair the table, run the mysqlcheck command with &lsquo;-c&rsquo; option to identify corrupted tables:<\/p><figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>mysqlcheck &ndash;c db_name <\/strong><strong><\/strong><\/td><\/tr><\/tbody><\/table><\/figure><p>This command will check for errors in all the tables of a specified database.<\/p><p>Alternatively, run the below command to check a specific table for corruption:<\/p><figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>mysqlcheck &ndash;c db_name tbl_name<\/strong><strong><\/strong><\/td><\/tr><\/tbody><\/table><\/figure><p>If the output of this command returns <strong>OK<\/strong>, it means that the table is not corrupted. But, if it reports table errors, you must repair it.<\/p><h3 class=\"wp-block-heading\" id=\"h-step-2-repair-the-tables\"><strong>Step 2 &ndash; Repair Corrupt Tables with mysqlcheck<\/strong><\/h3><p>To repair a table, specify the database name and the table name along with &lsquo;-r&rsquo; option as shown below:<\/p><figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>mysqlcheck -r db_name tbl_name<\/strong><strong><\/strong><\/td><\/tr><\/tbody><\/table><\/figure><p>This command only repairs MyISAM tables. To repair corrupted InnoDB tables, read this: <a href=\"https:\/\/www.stellarinfo.com\/blog\/repair-innodb-table-corruption-in-mysql\/\" target=\"_blank\" rel=\"noreferrer noopener\"><u>Best Ways to Repair InnoDB Table Corruption in MySQL<\/u><\/a>.<\/p><h2 class=\"wp-block-heading\" id=\"when-to-use-a-dedicated-repair-tool-for-severe-corruption\"><strong>When to Use a Dedicated Repair Tool for Severe Corruption<\/strong><\/h2><p>If using mysqlcheck with the repair option fails to fix corrupted tables, try <a href=\"https:\/\/dev.mysql.com\/doc\/refman\/5.7\/en\/rebuilding-tables.html\" target=\"_blank\" rel=\"noreferrer noopener\"><u>alternative methods to rebuild or repair a table<\/u><\/a>&nbsp;recommended by Microsoft. However, these methods may result in data integrity issues. Also, you may lose some data.<\/p><p>One of the easiest methods to repair database tables without data loss is to use a third-party <a href=\"https:\/\/www.stellarinfo.com\/mysql-repair.php\" target=\"_blank\" rel=\"noreferrer noopener\">MySQL repair tool<\/a>. <strong>Stellar Repair for MySQL<\/strong> is an efficient tool you can use to fix corruption in MyISAM and InnoDB tables.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/cloud.stellarinfo.com\/StellarRepairforMySQL-B.exe\"><img loading=\"lazy\" decoding=\"async\" width=\"252\" height=\"72\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/11\/free-download-1-1.webp\" alt=\"Free Download for Windows \" class=\"wp-image-114904 apply-gradient-on-post-images\"><\/a><\/figure>\n<\/div><p>Download and install the SQL repair tool. After installation, launch the tool and follow these steps:<\/p><p><strong>Step 1:<\/strong>&nbsp;Click <strong>OK<\/strong>&nbsp;to proceed with the repair process.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"514\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/instruction-window-1-1024x514.png\" alt=\"Repair process confirmation - Click OK to proceed.\" class=\"wp-image-83750 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/instruction-window-1-1024x514.png 1024w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/instruction-window-1-300x151.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/instruction-window-1-768x386.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/instruction-window-1.png 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><p><strong>Step 2:<\/strong>&nbsp;Select MySQL version and data folder containing the database with corrupted tables.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"514\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-mysql-data-folder-2-1024x514.png\" alt=\"Screenshot of MySQL version selection and data folder containing corrupted tables in database.\" class=\"wp-image-83751 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-mysql-data-folder-2-1024x514.png 1024w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-mysql-data-folder-2-300x150.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-mysql-data-folder-2-768x385.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-mysql-data-folder-2.png 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><p><strong>Step 3:<\/strong>&nbsp;After making the appropriate selection, click <strong>OK<\/strong>.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"515\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-data-foldet-selected-3-1024x515.png\" alt=\"Mysql Data Folder Selected\" class=\"wp-image-83752 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-data-foldet-selected-3-1024x515.png 1024w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-data-foldet-selected-3-300x151.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-data-foldet-selected-3-768x386.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-data-foldet-selected-3.png 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><p><strong>Step 4:<\/strong>&nbsp;Select all or a specific database containing tables you want to repair, and then click <strong>Repair<\/strong>.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"505\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-databases-to-be-repaired-4-1024x505.png\" alt=\"Select database tables for repair and click 'Repair' to initiate the database repair process.\" class=\"wp-image-83753 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-databases-to-be-repaired-4-1024x505.png 1024w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-databases-to-be-repaired-4-300x148.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-databases-to-be-repaired-4-768x379.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/select-databases-to-be-repaired-4.png 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><p><strong>Step 5:<\/strong>&nbsp;After completion of the repair process, click <strong>OK<\/strong>.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"567\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-database-repaired-message-5-1024x567.png\" alt=\"Screenshot of repair process completion confirmation dialog with the 'OK' button highlighted.\" class=\"wp-image-83754 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-database-repaired-message-5-1024x567.png 1024w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-database-repaired-message-5-300x166.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-database-repaired-message-5-768x425.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/mysql-database-repaired-message-5.png 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><p><strong>Step 6:<\/strong>&nbsp;A window opens with a list of all the recoverable tables and other objects on the left pane. Click on the table to view its data on the right pane. Select the tables you want to repair, click&nbsp;<strong>Save<\/strong>&nbsp;from the&nbsp;<strong>File<\/strong>&nbsp;menu.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"489\" height=\"258\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/preview-recoverable-table-data-6.png\" alt=\"Recoverable tables list with data viewing and selection options.\" class=\"wp-image-83755 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/preview-recoverable-table-data-6.png 489w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/preview-recoverable-table-data-6-300x158.png 300w\" sizes=\"auto, (max-width: 489px) 100vw, 489px\" \/><\/figure>\n<\/div><p><strong>Step 7: <\/strong>On the <strong>Save Database<\/strong>&nbsp;dialog box, select <strong>&lsquo;MySQL&rsquo;<\/strong>&nbsp;file format to save the repaired tables. Next, enter the server details for saving the file with restored tables. Click <strong>Save<\/strong>.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"455\" height=\"264\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/file-saving-options-7.png\" alt=\"Save Database MySQL file format server details click save.\" class=\"wp-image-83756 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/file-saving-options-7.png 455w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/07\/file-saving-options-7-300x174.png 300w\" sizes=\"auto, (max-width: 455px) 100vw, 455px\" \/><\/figure>\n<\/div><p>You will get a message after the file gets saved.<\/p><h2 class=\"wp-block-heading\" id=\"conclusion-&ndash;-maintain-regular-checks-and-backups\"><strong>Conclusion &ndash; Maintain Regular Checks and Backups<\/strong><\/h2><p>Whether you&rsquo;re having trouble opening MySQL tables or accessing the records, using mysqlcheck can help check corruption in MySQL tables and repair them. If this didn&rsquo;t work, try the alternative methods suggested in this blog to restore the table. For further support or any queries, leave a comment below.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Occasionally, you may need to repair corruption in MySQL tables. Corruption in&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/repair-mysql-tables-using-mysqlcheck\/\">Continue reading <span class=\"screen-reader-text\">How to Repair MySQL Tables Using mysqlcheck<\/span><\/a><\/p>\n","protected":false},"author":34,"featured_media":83759,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1048],"tags":[2080,2081],"class_list":["post-83749","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mysql-repair","tag-repair-mysql-tables","tag-repair-mysql-tables-using-mysqlcheck","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Repair MySQL Tables with mysqlcheck Utility<\/title>\n<meta name=\"description\" content=\"Use mysqlcheck to check, repair, analyze and optimize MyISAM or 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