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+All files contained in this folders **must not be re-applicable**!
+
+
+For this purpose we're versioning it using this format:
+
+
+
+**File name**: yyyy_mm_dd_XX.sql    
+
+yyyy -> year
+mm -> month
+dd -> day
+XX -> an incremental number if an sql with same date already exists, by default: 00
+
+**SQL Header ( the first query ):**
+
+The following is an example of the query that must be present in first row of every sql updates ( This example is specifically for auth database:)
+
+ALTER TABLE auth_db_version 
+CHANGE COLUMN 2016_07_09_01 
+2016_07_10_00 bit;
+
+Of course the rule is:
+
+CHANGE COLUMN 2016_07_09_01   <- the previous version
+
+2016_07_10_00 bit <-- the next version