PL/SQL: Exclamation Mark in ORACLE











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What are those exclamation(!) marks in the following query?



l_sql := q'!
SELECT CASE WHEN FILTER_CNT = 0 THEN NULL ELSE FILTER_LIST END AS FILTER_LIST
FROM
(
SELECT 'TABLE_NAME NOT LIKE ' || LISTAGG(''''||EXCLUSION_CRITERIA||'''', ' AND TABLE_NAME NOT LIKE ') WITHIN GROUP (ORDER BY ROWNUM) AS FILTER_LIST, COUNT(*) AS FILTER_CNT
FROM !'|| p_after_owner ||q'!.UT_TABLE_EXCLUSION
WHERE EXCLUSION_TYPE = 'P'
)
!';









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    up vote
    1
    down vote

    favorite
    2












    What are those exclamation(!) marks in the following query?



    l_sql := q'!
    SELECT CASE WHEN FILTER_CNT = 0 THEN NULL ELSE FILTER_LIST END AS FILTER_LIST
    FROM
    (
    SELECT 'TABLE_NAME NOT LIKE ' || LISTAGG(''''||EXCLUSION_CRITERIA||'''', ' AND TABLE_NAME NOT LIKE ') WITHIN GROUP (ORDER BY ROWNUM) AS FILTER_LIST, COUNT(*) AS FILTER_CNT
    FROM !'|| p_after_owner ||q'!.UT_TABLE_EXCLUSION
    WHERE EXCLUSION_TYPE = 'P'
    )
    !';









    share|improve this question
























      up vote
      1
      down vote

      favorite
      2









      up vote
      1
      down vote

      favorite
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      2





      What are those exclamation(!) marks in the following query?



      l_sql := q'!
      SELECT CASE WHEN FILTER_CNT = 0 THEN NULL ELSE FILTER_LIST END AS FILTER_LIST
      FROM
      (
      SELECT 'TABLE_NAME NOT LIKE ' || LISTAGG(''''||EXCLUSION_CRITERIA||'''', ' AND TABLE_NAME NOT LIKE ') WITHIN GROUP (ORDER BY ROWNUM) AS FILTER_LIST, COUNT(*) AS FILTER_CNT
      FROM !'|| p_after_owner ||q'!.UT_TABLE_EXCLUSION
      WHERE EXCLUSION_TYPE = 'P'
      )
      !';









      share|improve this question













      What are those exclamation(!) marks in the following query?



      l_sql := q'!
      SELECT CASE WHEN FILTER_CNT = 0 THEN NULL ELSE FILTER_LIST END AS FILTER_LIST
      FROM
      (
      SELECT 'TABLE_NAME NOT LIKE ' || LISTAGG(''''||EXCLUSION_CRITERIA||'''', ' AND TABLE_NAME NOT LIKE ') WITHIN GROUP (ORDER BY ROWNUM) AS FILTER_LIST, COUNT(*) AS FILTER_CNT
      FROM !'|| p_after_owner ||q'!.UT_TABLE_EXCLUSION
      WHERE EXCLUSION_TYPE = 'P'
      )
      !';






      oracle plsql dynamic-sql






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      asked Nov 20 at 11:43









      Success Shrestha

      1407




      1407
























          1 Answer
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          up vote
          6
          down vote



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          The q method of quoting strings means that you don't have to escape single quotes in the string.



          As per the documentation, it works like this:



          q'<single character delimiter><text><single character delimiter>'


          Therefore, the !s in your sample string are acting as the quote delimiter.



          For example, if you want to use the string Don't worry, be happy, in the old style quoting, that would become:



          'Don''t worry, be happy'


          but the new quoting mechanism would be:



          q'!Don't worry, be happy!'


          or



          q'{Don't worry, be happy}'


          etc.






          share|improve this answer























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            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            6
            down vote



            accepted










            The q method of quoting strings means that you don't have to escape single quotes in the string.



            As per the documentation, it works like this:



            q'<single character delimiter><text><single character delimiter>'


            Therefore, the !s in your sample string are acting as the quote delimiter.



            For example, if you want to use the string Don't worry, be happy, in the old style quoting, that would become:



            'Don''t worry, be happy'


            but the new quoting mechanism would be:



            q'!Don't worry, be happy!'


            or



            q'{Don't worry, be happy}'


            etc.






            share|improve this answer



























              up vote
              6
              down vote



              accepted










              The q method of quoting strings means that you don't have to escape single quotes in the string.



              As per the documentation, it works like this:



              q'<single character delimiter><text><single character delimiter>'


              Therefore, the !s in your sample string are acting as the quote delimiter.



              For example, if you want to use the string Don't worry, be happy, in the old style quoting, that would become:



              'Don''t worry, be happy'


              but the new quoting mechanism would be:



              q'!Don't worry, be happy!'


              or



              q'{Don't worry, be happy}'


              etc.






              share|improve this answer

























                up vote
                6
                down vote



                accepted







                up vote
                6
                down vote



                accepted






                The q method of quoting strings means that you don't have to escape single quotes in the string.



                As per the documentation, it works like this:



                q'<single character delimiter><text><single character delimiter>'


                Therefore, the !s in your sample string are acting as the quote delimiter.



                For example, if you want to use the string Don't worry, be happy, in the old style quoting, that would become:



                'Don''t worry, be happy'


                but the new quoting mechanism would be:



                q'!Don't worry, be happy!'


                or



                q'{Don't worry, be happy}'


                etc.






                share|improve this answer














                The q method of quoting strings means that you don't have to escape single quotes in the string.



                As per the documentation, it works like this:



                q'<single character delimiter><text><single character delimiter>'


                Therefore, the !s in your sample string are acting as the quote delimiter.



                For example, if you want to use the string Don't worry, be happy, in the old style quoting, that would become:



                'Don''t worry, be happy'


                but the new quoting mechanism would be:



                q'!Don't worry, be happy!'


                or



                q'{Don't worry, be happy}'


                etc.







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Nov 20 at 12:19

























                answered Nov 20 at 12:12









                Boneist

                17.9k11028




                17.9k11028






























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