如何EXECUTE
从 PL/SQL中获取动态选择结果Oracle sqlplus
?
我正在编写一个简单的 sqlplus 脚本来收集NUMBER
给定表的所有列的总和:
SET SERVEROUTPUT ON
DECLARE
CURSOR column_cur IS
SELECT column_name FROM ALL_TAB_COLS
WHERE owner = '&scheme_name' AND table_name = '&table_name'
AND data_type = 'NUMBER';
sql_query VARCHAR2(32767);
BEGIN
sql_query := 'select ';
FOR column_rec IN column_cur LOOP
sql_query := sql_query || 'SUM(' || column_rec.column_name ||
') "SUM(' || column_rec.column_name || ')", ';
END LOOP;
sql_query := substr(sql_query, 0, length(sql_query)-2) || -- remove trailing ', '
' from &scheme_name' || '.&table_name';
EXECUTE IMMEDIATE sql_query;
END;
/
动态生成的 SQL 语句在执行时会给出如下内容:
SUM(X) | SUM(Y) | SUM(Z) |
--------------------------
111 | 222 | 333 |
但是,即使使用SET SERVEROUTPUT ON
,运行 sqlplus 脚本也只会提供:
PL/SQL procedure successfully completed.