{"id":23014,"date":"2024-03-16T00:42:11","date_gmt":"2024-03-16T00:42:11","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-does-the-oracle-iterate-over-the-values-of-an-array\/"},"modified":"2024-03-22T00:15:15","modified_gmt":"2024-03-22T00:15:15","slug":"how-does-the-oracle-iterate-over-the-values-of-an-array","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-does-the-oracle-iterate-over-the-values-of-an-array\/","title":{"rendered":"How does the oracle iterate over the values of an array?"},"content":{"rendered":"<p>In Oracle, looping can be used to iterate through array values. Here are two commonly used methods:<\/p>\n<ol>\n<li>Traverse the array using a FOR loop.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">DECLARE<\/span>\r\n  TYPE array_type <span class=\"hljs-keyword\">IS<\/span> VARRAY(<span class=\"hljs-number\">3<\/span>) <span class=\"hljs-keyword\">OF<\/span> VARCHAR2(<span class=\"hljs-number\">10<\/span>);\r\n  my_array array_type :<span class=\"hljs-operator\">=<\/span> array_type(<span class=\"hljs-string\">'value1'<\/span>, <span class=\"hljs-string\">'value2'<\/span>, <span class=\"hljs-string\">'value3'<\/span>);\r\n<span class=\"hljs-keyword\">BEGIN<\/span>\r\n  <span class=\"hljs-keyword\">FOR<\/span> i <span class=\"hljs-keyword\">IN<\/span> <span class=\"hljs-number\">1.<\/span>.my_array.COUNT LOOP\r\n    DBMS_OUTPUT.PUT_LINE(my_array(i));\r\n  <span class=\"hljs-keyword\">END<\/span> LOOP;\r\n<span class=\"hljs-keyword\">END<\/span>;\r\n<\/code><\/pre>\n<p>In the example above, an array type named array_type is defined first, followed by the creation of an array called my_array with three elements. Next, a FOR loop is used to iterate through the array indices from 1 to the number of elements in the array (my_array.COUNT), accessing the values at each index and printing them out.<\/p>\n<ol>\n<li>Iterate through an array using a FOREACH loop.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">DECLARE<\/span>\r\n  TYPE array_type <span class=\"hljs-keyword\">IS<\/span> VARRAY(<span class=\"hljs-number\">3<\/span>) <span class=\"hljs-keyword\">OF<\/span> VARCHAR2(<span class=\"hljs-number\">10<\/span>);\r\n  my_array array_type :<span class=\"hljs-operator\">=<\/span> array_type(<span class=\"hljs-string\">'value1'<\/span>, <span class=\"hljs-string\">'value2'<\/span>, <span class=\"hljs-string\">'value3'<\/span>);\r\n<span class=\"hljs-keyword\">BEGIN<\/span>\r\n  <span class=\"hljs-keyword\">FOR<\/span> item <span class=\"hljs-keyword\">IN<\/span> my_array.FIRST..my_array.LAST LOOP\r\n    DBMS_OUTPUT.PUT_LINE(my_array(item));\r\n  <span class=\"hljs-keyword\">END<\/span> LOOP;\r\n<span class=\"hljs-keyword\">END<\/span>;\r\n<\/code><\/pre>\n<p>In the example above, an array type array_type is first defined, and then an array my_array containing three elements is created. Next, a FOREACH loop is used to iterate through the array indexes, from the first element of the array (my_array.FIRST) to the last element (my_array.LAST), accessing the array values by index and printing them out.<\/p>\n<p>&#8211; The choice between using a FOR loop or a FOREACH loop to iterate through array values depends on personal preference and needs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Oracle, looping can be used to iterate through array values. Here are two commonly used methods: Traverse the array using a FOR loop. DECLARE TYPE array_type IS VARRAY(3) OF VARCHAR2(10); my_array array_type := array_type(&#8216;value1&#8217;, &#8216;value2&#8217;, &#8216;value3&#8217;); BEGIN FOR i IN 1..my_array.COUNT LOOP DBMS_OUTPUT.PUT_LINE(my_array(i)); END LOOP; END; In the example above, an array type named [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-23014","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How does the oracle iterate over the values of an array? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-does-the-oracle-iterate-over-the-values-of-an-array\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How does the oracle iterate over the values of an array?\" \/>\n<meta property=\"og:description\" content=\"In Oracle, looping can be used to iterate through array values. Here are two commonly used methods: Traverse the array using a FOR loop. 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