oracle批量安插随机数的方法
日期：2014-05-16 浏览次数：20577 次
oracle批量插入随机数的方法
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创建表dimension_tab
DROP TABLE dimension_tab; CREATE TABLE dimension_tab ( fact_1_id NUMBER NOT NULL, fact_2_id NUMBER NOT NULL, fact_3_id NUMBER NOT NULL, fact_4_id NUMBER NOT NULL, sales_value NUMBER(10,2) NOT NULL );
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INSERT INTO dimension_tab
SELECT TRUNC(DBMS_RANDOM.value(1, ?3)) AS fact_1_id,
? ? ? ?TRUNC(DBMS_RANDOM.value(1, 6)) AS fact_2_id,
? ? ? ?TRUNC(DBMS_RANDOM.value(1, 11)) AS fact_3_id,
? ? ? ?TRUNC(DBMS_RANDOM.value( 1, 11)) AS fact_4_id
? ? ? ?,ROUND(DBMS_RANDOM.value(1, 100), 2) AS sales_value
FROM ? dual
CONNECT BY level <= 1000;
COMMIT;
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【模型如下】
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INSERT INTO dimension_tab
SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
TRUNC(DBMS_RANDOM.value(low => 1, high => 6)) AS fact_2_id,
TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_3_id,
TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_4_id,
ROUND(DBMS_RANDOM.value(low => 1, high => 100), 2) AS sales_value
FROM dual
CONNECT BY level <= 1000;
COMMIT;
参考：http://www.oracle-base.com/articles/misc/RollupCubeGroupingFunctionsAndGroupingSets.php
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