{"id":501,"date":"2019-06-01T02:55:22","date_gmt":"2019-06-01T10:55:22","guid":{"rendered":"https:\/\/db2tutorial.com\/?page_id=501"},"modified":"2020-04-11T06:59:08","modified_gmt":"2020-04-11T14:59:08","slug":"db2-drop-table","status":"publish","type":"page","link":"https:\/\/www.db2tutorial.com\/db2-basics\/db2-drop-table\/","title":{"rendered":"Db2 DROP TABLE"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the Db2 <code>DROP TABLE<\/code> statement to delete an existing table from a database.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction to Db2 DROP TABLE statement<\/h2>\n\n\n\n<p>Sometimes, you may want to delete one or more unused tables from a database. To do this, you use the <code>DROP TABLE<\/code> statement as follows:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DROP<\/span> <span class=\"hljs-keyword\">TABLE<\/span> &#91;schema_name.]table_name;\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>First, specify the name of the schema to which the table belongs. The schema is optional. If you skip it, the statement will delete the specified table in the current schema.<\/li><li>Second, specify the name of the table that you want to drop.<\/li><\/ul>\n\n\n\n<p>When you use the <code>DROP TABLE<\/code> statement to delete a table, Db2 performs the following actions:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Delete all data in the table permanently.<\/li><li>Delete all columns of the dropped table and the indexes associated with these columns.<\/li><li>Mark all views that reference to the dropped table as inoperative.<\/li><li>Also, mark all triggers that depend on the dropped table as inoperative.<\/li><li>Revoke all privileges on the table and dependent views.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Db2 DROP TABLE examples<\/h2>\n\n\n\n<p>Let&#8217;s <a href=\"https:\/\/db2tutorial.com\/db2-basics\/db2-create-table\/\">create three new tables<\/a> to demonstrate the <code>DROP TABLE<\/code> statement.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> t1(\n\t<span class=\"hljs-keyword\">id<\/span> <span class=\"hljs-built_in\">INT<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>\n);\n\n<span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> t2(\n\t<span class=\"hljs-keyword\">id<\/span> <span class=\"hljs-built_in\">INT<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>\n);\n\n<span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> t3(\n\t<span class=\"hljs-keyword\">id<\/span> <span class=\"hljs-built_in\">INT<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>,\n\tfk <span class=\"hljs-built_in\">INT<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span>,\n\t<span class=\"hljs-keyword\">FOREIGN<\/span> <span class=\"hljs-keyword\">KEY<\/span> fk_t2(fk) <span class=\"hljs-keyword\">REFERENCES<\/span> t2(<span class=\"hljs-keyword\">id<\/span>)\n);\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\">1) Drop a table example<\/h3>\n\n\n\n<p>The following statement uses the <code>DROP TABLE<\/code> statement to drop the <code>t1<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DROP<\/span> <span class=\"hljs-keyword\">TABLE<\/span> t1;\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>This example is straight forward. The table <code>t1<\/code> was just dropped successfully.<\/p>\n\n\n\n<p>In practice, a table may have <a href=\"https:\/\/db2tutorial.com\/db2-basics\/db2-foreign-key\/\">foreign key<\/a> references like the <code>t2<\/code> table.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2) Drop a table with foreign key constraint example<\/h3>\n\n\n\n<p>The following example uses the <code>DROP TABLE<\/code> statement to drop the <code>t2<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DROP<\/span> <span class=\"hljs-keyword\">TABLE<\/span> t2;\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>t2<\/code> table was dropped. 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