How To Write a Start Routine in Update Rules

ABAP code used in Start Routines of Update Rules :

Here I am giving some sample ABAP code used in Update rules to filter unwanted records.

NE - Not Equal
EQ - Equal(=)
LT - Less Than (<)
GT - Greater Than (>)
BT - Between

1 :
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DELETE DATA_PACKAGE WHERE ORGUNIT IS INITIAL.

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2:
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DELETE DATA_PACKAGE WHERE REPTT NE '00000009'.


* DELETE DATA_PACKAGE WHERE REPTT EQ '00000009'.
* DELETE DATA_PACKAGE WHERE REPTT = '00000009'.

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3:
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DELETE DATA_PACKAGE WHERE REPTT EQ '00000001'
                       OR REPTT EQ '00000002'
                       OR REPTT EQ '00000003'
                       OR REPTT EQ '00000004'
                       OR REPTT EQ '00000005'
                       OR REPTT EQ '00000006'.

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4:
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DELETE DATA_PACKAGE WHERE WRHRS EQ '0'
                 AND DUR_ACTUAL EQ '0'
                 AND DUR_VALUE  EQ '0'
                 AND PLHRS      EQ '0'
                 AND ALP_AMOUNT EQ '0'.

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5:
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LOOP AT DATA_PACKAGE.
      IF DATA_PACKAGE-COMP_CODE NE '1000'.
         DELETE DATA_PACKAGE.
ENDLOOP.

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If you have any more examples, please feel free to post in the comments.