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* 2015-06-22

SELECT * FROM `nent` WHERE (dt_create < '2015-03-01')
DELETE FROM `nent` WHERE (dt_create < '2015-03-01')
SELECT * FROM `fc2` WHERE (dt_create < '2015-04-01')
DELETE FROM `fc2` WHERE (dt_create < '2015-04-01')

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* 2015-07-01

SELECT * FROM `nent` WHERE (dt_create < '2015-03-15')
DELETE FROM `nent` WHERE (dt_create < '2015-03-15')

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* 2015-07-10

Delete 15days : 2015-04-01 --- 2015-04-15
SELECT * FROM `fc2` WHERE (dt_create < '2015-04-15') ==> 21051
DELETE FROM `fc2` WHERE (dt_create < '2015-04-15')

Delete 15days : 2015-03-15 --- 2015-04-01
SELECT * FROM `nent` WHERE (dt_create < '2015-04-01') ==> 44278
DELETE FROM `nent` WHERE (dt_create < '2015-04-01')

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* 2015-07-25

Delete 15days : 2015-04-15 --- 2015-05-01
SELECT * FROM `fc2` WHERE (dt_create < '2015-05-01') ==> 24210
DELETE FROM `fc2` WHERE (dt_create < '2015-05-01')

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* 2015-07-27

Delete 15days : 2015-04-01 --- 2015-04-15
SELECT * FROM `nent` WHERE (dt_create < '2015-04-15') ==> 34786
DELETE FROM `nent` WHERE (dt_create < '2015-04-15')

==========================================================
* 2015-08-05

Delete 15days : 2015-05-01 --- 2015-05-15
SELECT * FROM `fc2` WHERE (dt_create < '2015-05-15') ==> 22781
DELETE FROM `fc2` WHERE (dt_create < '2015-05-15')

Delete 15days : 2015-04-15 --- 2015-05-01
SELECT * FROM `nent` WHERE (dt_create < '2015-05-01') ==> 43204
DELETE FROM `nent` WHERE (dt_create < '2015-05-01')

==========================================================
* 2015-08-23

Delete 15days : 2015-05-15 --- 2015-06-01
SELECT * FROM `fc2` WHERE (dt_create < '2015-06-01') ==> 23404
DELETE FROM `fc2` WHERE (dt_create < '2015-06-01')

Delete 15days : 2015-05-01 --- 2015-05-15
SELECT * FROM `nent` WHERE (dt_create < '2015-05-15') ==> 43746
DELETE FROM `nent` WHERE (dt_create < '2015-05-15')

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* 2015-09-08

Delete 15days : 2015-06-01 --- 2015-06-08
SELECT * FROM `fc2` WHERE (dt_create < '2015-06-08') ==> 7943
DELETE FROM `fc2` WHERE (dt_create < '2015-06-08')

Delete 15days : 2015-05-15 --- 2015-06-01
SELECT * FROM `nent` WHERE (dt_create < '2015-06-01') ==> 41540
DELETE FROM `nent` WHERE (dt_create < '2015-06-01')

==========================================================
* 2015-09-12

Delete 15days : 2015-06-18 --- 2015-06-23
SELECT * FROM `fc2` WHERE (dt_create < '2015-06-23') ==> 14110
DELETE FROM `fc2` WHERE (dt_create < '2015-06-23')

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* 2015-11-26

Delete 15days : 2015-06-23 --- 2015-07-15
SELECT * FROM `fc2` WHERE (dt_create < '2015-07-15') ==> 36200
DELETE FROM `fc2` WHERE (dt_create < '2015-07-15')

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* 2016-02-14

Delete 30days : 2015-07-15 --- 2015-08-15
SELECT * FROM `fc2` WHERE (dt_create < '2015-08-15') ==> 48699
DELETE FROM `fc2` WHERE (dt_create < '2015-08-15')