Sql updating a table with values from another table
Oracle lets you write stored procedures and anonymous PL/SQL blocks that use dynamic SQL. DEFINE_COLUMN(curid, i, numvar); ELSIF desctab(i).col_type = 12 THEN DBMS_SQL. COLUMN_VALUE(curid, i, namevar); ELSIF (desctab(i).col_type = 2) THEN DBMS_SQL. CLOSE_CURSOR(curid); END; / CREATE OR REPLACE PROCEDURE DO_QUERY(mgr_id NUMBER) IS TYPE Cur Type IS REF CURSOR; src_cur Cur Type; curid NUMBER; sql_stmt VARCHAR2(200); ret INTEGER; empnos DBMS_SQL. Dynamic SQL statements are not embedded in your source program; rather, they are stored in character strings that are input to, or built by, the program at runtime. COLUMN_VALUE(curid, i, numvar); ELSIF (desctab(i).col_type = 12) THEN DBMS_SQL.
If the actual value for the cursor number in a call to the IS_OPEN Function denotes a cursor currently open in the session, the return value is subprogram that has no formal parameter for the cursor number; rather, it returns a cursor number. DEFINE_ARRAY(c, 1, n_tab, 10, indx); d := DBMS_SQL.
Subprogram inlining replaces a subprogram invocation with a copy of the invoked subprogram (if the invoked and invoking subprograms are in the same program unit).
To allow subprogram inlining, either accept the default value of the pragma (with the preceding syntax) to give a subprogram a high priority for inlining, and then the compiler inlines it unless other considerations or limits make the inlining undesirable.
ALTER table operations may be required to meet changing logical or operational demands.
Once a table is populated with data, then any change to the table structure requires additional concerns in terms of data protection, smooth operation of the system and size of the table.
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Native Dynamic SQL is an alternative to PL/SQL differs somewhat from other common programming languages, such as C.