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The command 'new_value' for SQLPlus
Format:
column column_name new_value var_name
Meaning:
use the column_name of a select statment to construct a variable, later we can use &var_name to refer its value.
If the Select statement returned more that one row, the last row value will be assigned to the variable.
Example 1:
-- create directory and varchar2 arraycol value new_value user_dump_directory;select value from v$parameter where name = ‘user_dump_dest‘;create or replace directory user_dump_dir as ‘&user_dump_directory‘;
Example 2
set feedback offset verify offcreate table new_value_test_from ( some_field_name Varchar2(20));create table new_value_test_to ( another_field Varchar2(20));
insert into new_value_test_from values (‘Maegerli Mucki‘);column some_field_name new_value some_var_nameselect some_field_name from new_value_test_from;insert into new_value_test_to values (‘&some_var_name‘);select * from new_value_test_to;drop table new_value_test_from;drop table new_value_test_to;
set feedback offset verify offcreate table new_value_test ( some_field_name Varchar2(20));Example 3
insert into new_value_test values (‘Maegerli Mucki‘);insert into new_value_test values (‘Globi‘);column some_field_name new_value some_var_nameselect some_field_name from new_value_test;drop table new_value_test;
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