{"id":80,"date":"2014-05-22T13:13:00","date_gmt":"2014-05-22T12:13:00","guid":{"rendered":"https:\/\/debuggersspace.com\/index.php\/2014\/05\/22\/what-is-self-join-and-when-would-you-use-it-2\/"},"modified":"2014-05-22T13:13:00","modified_gmt":"2014-05-22T12:13:00","slug":"what-is-self-join-and-when-would-you-use-it-2","status":"publish","type":"post","link":"https:\/\/debuggersspace.com\/index.php\/2014\/05\/22\/what-is-self-join-and-when-would-you-use-it-2\/","title":{"rendered":"What is SELF JOIN and when would you use it?"},"content":{"rendered":"
\n
\n \t<\/i> Read Time:<\/span>19 Second <\/div>\n\n <\/div>
\n<\/p>\n
    \n
  • The SQL <\/span>SELF JOIN<\/b> is used to join a table to itself<\/span><\/span><\/li>\n
  • You use a self join when a table references data in itself.<\/span><\/li>\n
  • SQL self-join simply is a normal join which is used to join a table to itself.<\/span><\/li>\n<\/ul>\n

    \nExample:<\/p>\n

    SELECT a<\/span>.<\/span>column_name<\/span>,<\/span> b<\/span>.<\/span>column_name<\/span>...<\/span><\/span><\/pre>\n
    FROM table1 a,<\/span>table1 b<\/pre>\n
    WHERE a<\/span>.<\/span>common_field <\/span>=<\/span> b<\/span>.<\/span>common_field<\/span>;<\/span><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    The SQL SELF JOIN is used to join a table to itself You use a self join when a table references data in itself. SQL self-join simply is a normal join which is used to join a table to itself. Example: SELECT a.column_name, b.column_name… FROM table1 a,table1 b WHERE a.common_field = b.common_field;<\/p>\n","protected":false},"author":43,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[34,27],"tags":[],"class_list":["post-80","post","type-post","status-publish","format-standard","hentry","category-ibm","category-sql"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"Himanshu Namdeo","author_link":"https:\/\/debuggersspace.com\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"The SQL SELF JOIN is used to join a table to itself You use a self join when a table references data in itself. SQL self-join simply is a normal join which is used to join a table to itself. Example: SELECT a.column_name, b.column_name... FROM table1 a,table1 b WHERE a.common_field = b.common_field;","_links":{"self":[{"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/posts\/80"}],"collection":[{"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/users\/43"}],"replies":[{"embeddable":true,"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/comments?post=80"}],"version-history":[{"count":0,"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/posts\/80\/revisions"}],"wp:attachment":[{"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/media?parent=80"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/categories?post=80"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/debuggersspace.com\/index.php\/wp-json\/wp\/v2\/tags?post=80"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}