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ABORT [ WORK | TRANSACTION ] ;

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--创建表customer_demographics_t1。
CREATE TABLE customer_demographics_t1
(
    CD_DEMO_SK                INTEGER               NOT NULL,
    CD_GENDER                 CHAR(1)                       ,
    CD_MARITAL_STATUS         CHAR(1)                       ,
    CD_EDUCATION_STATUS       CHAR(20)                      ,
    CD_PURCHASE_ESTIMATE      INTEGER                       ,
    CD_CREDIT_RATING          CHAR(10)                      ,
    CD_DEP_COUNT              INTEGER                       ,
    CD_DEP_EMPLOYED_COUNT     INTEGER                       ,
    CD_DEP_COLLEGE_COUNT      INTEGER
)
WITH (ORIENTATION = COLUMN,COMPRESSION=MIDDLE)
DISTRIBUTE BY HASH (CD_DEMO_SK);

--插入记录。
INSERT INTO customer_demographics_t1 VALUES(1920801,'M', 'U', 'DOCTOR DEGREE', 200, 'GOOD', 1, 0,0);

--开启事务。
START TRANSACTION;

--更新字段值。
UPDATE customer_demographics_t1 SET cd_education_status= 'Unknown';

--终止事务，上面所执行的更新会被撤销掉。
ABORT; 

--查询数据。
SELECT * FROM customer_demographics_t1 WHERE cd_demo_sk = 1920801;
cd_demo_sk | cd_gender | cd_marital_status | cd_education_status  | cd_purchase_estimate | cd_credit_rating | cd_dep_count | cd_dep_employed_count | cd_dep_college_count 
------------+-----------+-------------------+----------------------+----------------------+------------------+--------------+-----------------------+----------------------
    1920801 | M         | U                 | DOCTOR DEGREE        |                  200 | GOOD             |            1 |                     0 |                    0
(1 row)

--删除表。
DROP TABLE customer_demographics_t1;