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to_char(img_comm_metadata.scene_centre_time,'yyyy-mm-dd hh24:mm:ss')>='1990-10-13 09:41:20'
SQL code:
datediff(ss,'1990-10-13 09:41:20',img_comm_metadata.scene_centre_time)>0


CONVERT(varchar(20),img_comm_metadata.scene_centre_time,120)

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to_char(img_comm_metadata.scene_centre_time,'yyyy-mm-dd hh24:mm:ss')>='1990-10-13 09:41:20'

convert(varchar(19),scene_centre_time,120)

SQL code:
select convert(varchar(19),getdate(),120)

/*

-------------------
2009-10-13 10:04:48

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*/


to_number('79.3916690681319')
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SQL codedatediff(ss,'1990-10-13 09:41:20',img_comm_metadata.scene_centre_time)>0


SQL code



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