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I know that we use SQL*Plus and the data dictionary to rebuild other DDL statements throughout this book. How do I re-create CREATE VIEW statements using the data dictionary?<p><B>Technique</B><p>The query used to rebuild CREATE VIEW statements uses the ALL_VIEWS data dictionary view. The TEXT column contains the query used by the view to return rows. The TEXT column is of the LONG datatype, which makes it harder to work with in SQL*Plus. Many operators and functions cannot be used with columns of the LONG datatype.<p><B>Steps</B><p><B>1.</B>	Run SQL*Plus and connect as the WAITE user account. CHP7_18.SQL, shown in <A HREF="image/07oht10.gif" TARGET="_blank">Figure 7.10</A>, depicts a query of the TEXT column in the ALL_VIEWS data dictionary view.<p>The first three commands set SQL*Plus system variables to turn the heading off, set the long data display to 2,000 characters, and turn feedback off. This formats the output of the query and removes the query heading and the feedback displayed when the query completes. Line 4 suppresses the verification of substitution variables. The query retrieves the TEXT column from the ALL_VIEWS data dictionary view.<p><B>2.</B>	Run the CHP7_18.SQL script. Substitute the &OWNER substitution variable with SYS and the &VIEW_NAME substitution variable with DBA_CONSTRAINTS.<p><code><b>SQL>  START CHP7_18<p>Enter value for owner: SYS<p>Enter value for view_name: DBA_CONSTRAINTS<p>select ou.name, oc.name,<p>decode(c.type#, 1, 慍
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