Document (#10461)

Author
Staud, J.L.
Title
Erste Schritte mit SQL : Einführung in SQL
Issue
T.1-2.
Source
Datenbanken in Theorie und Praxis. 1995, H.1, S.23-28 (T.1), H.2, S.31-38 (T.2)
Year
1995
Abstract
Im Bereich der Relationalen Datenbanksysteme hat sich eine Abfragesprache auf breiter Front durchgesetzt, die 'Structured Query Language (SQL)'. Ein Grund ist, daß sie mehr ist als nur eine Abfragesprache. Sie ist eine umfassende befehlsorientierte formale Sprache für die Einrichtung und den Betrieb Relationaler Datenbanken. Noch mehr Bedeutung gewinnt sie in letzter Zeit, weil sie DAS Mittel für die Verknüpfung verschiedener Datenbestände ist. Insbesondere unter 'Onlinern' hat SQL den Ruf, schwierig zu sein. Dem ist nicht so
Object
SQL

Similar documents (author)

  1. Staud, J.L.: ¬Die Welt der Online-Datenbanken : Modellierung, Datenstruktur und Retrievalprozeß (1986) 5.25
    5.2535195 = sum of:
      5.2535195 = weight(author_txt:staud in 980) [ClassicSimilarity], result of:
        5.2535195 = fieldWeight in 980, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.405631 = idf(docFreq=26, maxDocs=44421)
          0.625 = fieldNorm(doc=980)
    
  2. Staud, J.L.: Relationale Datenbanken aufbauen : die zweiten drei Normalformen (1994) 5.25
    5.2535195 = sum of:
      5.2535195 = weight(author_txt:staud in 5339) [ClassicSimilarity], result of:
        5.2535195 = fieldWeight in 5339, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.405631 = idf(docFreq=26, maxDocs=44421)
          0.625 = fieldNorm(doc=5339)
    
  3. Staud, J.L.: Relationale Datenbanksysteme : eine Einführung (1994) 5.25
    5.2535195 = sum of:
      5.2535195 = weight(author_txt:staud in 6599) [ClassicSimilarity], result of:
        5.2535195 = fieldWeight in 6599, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.405631 = idf(docFreq=26, maxDocs=44421)
          0.625 = fieldNorm(doc=6599)
    
  4. Staud, J.L.: Typen datenverwaltender Systeme : T.1 (1993) 5.25
    5.2535195 = sum of:
      5.2535195 = weight(author_txt:staud in 6677) [ClassicSimilarity], result of:
        5.2535195 = fieldWeight in 6677, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.405631 = idf(docFreq=26, maxDocs=44421)
          0.625 = fieldNorm(doc=6677)
    
  5. Staud, J.L.: Lernen mit Hypermedia : die CBT-Disketten der Fernuniversität (1994) 5.25
    5.2535195 = sum of:
      5.2535195 = weight(author_txt:staud in 7184) [ClassicSimilarity], result of:
        5.2535195 = fieldWeight in 7184, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.405631 = idf(docFreq=26, maxDocs=44421)
          0.625 = fieldNorm(doc=7184)
    

Similar documents (content)

  1. Kleinschmidt, P.; Rank, C.: Relationale Datenbanksysteme : eine praktische Einführung (1997) 0.20
    0.1952644 = sum of:
      0.1952644 = product of:
        1.2204025 = sum of:
          0.077084646 = weight(abstract_txt:sprache in 1984) [ClassicSimilarity], result of:
            0.077084646 = score(doc=1984,freq=1.0), product of:
              0.10304676 = queryWeight, product of:
                5.98444 = idf(docFreq=303, maxDocs=44421)
                0.017219115 = queryNorm
              0.748055 = fieldWeight in 1984, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.98444 = idf(docFreq=303, maxDocs=44421)
                0.125 = fieldNorm(doc=1984)
          0.2195245 = weight(abstract_txt:relationalen in 1984) [ClassicSimilarity], result of:
            0.2195245 = score(doc=1984,freq=1.0), product of:
              0.20703532 = queryWeight, product of:
                1.4174412 = boost
                8.482592 = idf(docFreq=24, maxDocs=44421)
                0.017219115 = queryNorm
              1.060324 = fieldWeight in 1984, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.482592 = idf(docFreq=24, maxDocs=44421)
                0.125 = fieldNorm(doc=1984)
          0.87797034 = weight(title_txt:datenbanksysteme in 1984) [ClassicSimilarity], result of:
            0.87797034 = score(doc=1984,freq=1.0), product of:
              0.22628911 = queryWeight, product of:
                1.4818856 = boost
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.017219115 = queryNorm
              3.8798614 = fieldWeight in 1984, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.4375 = fieldNorm(doc=1984)
          0.045823038 = weight(abstract_txt:eine in 1984) [ClassicSimilarity], result of:
            0.045823038 = score(doc=1984,freq=1.0), product of:
              0.10507162 = queryWeight, product of:
                1.7489854 = boost
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.017219115 = queryNorm
              0.4361124 = fieldWeight in 1984, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.125 = fieldNorm(doc=1984)
        0.16 = coord(4/25)
    
  2. Kleinschmidt, P.; Rank, C.: Relationale Datenbanksysteme : eine praktische Einführung (2001) 0.20
    0.1952644 = sum of:
      0.1952644 = product of:
        1.2204025 = sum of:
          0.077084646 = weight(abstract_txt:sprache in 137) [ClassicSimilarity], result of:
            0.077084646 = score(doc=137,freq=1.0), product of:
              0.10304676 = queryWeight, product of:
                5.98444 = idf(docFreq=303, maxDocs=44421)
                0.017219115 = queryNorm
              0.748055 = fieldWeight in 137, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.98444 = idf(docFreq=303, maxDocs=44421)
                0.125 = fieldNorm(doc=137)
          0.2195245 = weight(abstract_txt:relationalen in 137) [ClassicSimilarity], result of:
            0.2195245 = score(doc=137,freq=1.0), product of:
              0.20703532 = queryWeight, product of:
                1.4174412 = boost
                8.482592 = idf(docFreq=24, maxDocs=44421)
                0.017219115 = queryNorm
              1.060324 = fieldWeight in 137, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.482592 = idf(docFreq=24, maxDocs=44421)
                0.125 = fieldNorm(doc=137)
          0.87797034 = weight(title_txt:datenbanksysteme in 137) [ClassicSimilarity], result of:
            0.87797034 = score(doc=137,freq=1.0), product of:
              0.22628911 = queryWeight, product of:
                1.4818856 = boost
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.017219115 = queryNorm
              3.8798614 = fieldWeight in 137, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.4375 = fieldNorm(doc=137)
          0.045823038 = weight(abstract_txt:eine in 137) [ClassicSimilarity], result of:
            0.045823038 = score(doc=137,freq=1.0), product of:
              0.10507162 = queryWeight, product of:
                1.7489854 = boost
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.017219115 = queryNorm
              0.4361124 = fieldWeight in 137, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.125 = fieldNorm(doc=137)
        0.16 = coord(4/25)
    
  3. Staud, J.L.: Relationale Datenbanksysteme : eine Einführung (1994) 0.17
    0.16563973 = sum of:
      0.16563973 = product of:
        1.3803312 = sum of:
          0.27440563 = weight(abstract_txt:relationalen in 6599) [ClassicSimilarity], result of:
            0.27440563 = score(doc=6599,freq=1.0), product of:
              0.20703532 = queryWeight, product of:
                1.4174412 = boost
                8.482592 = idf(docFreq=24, maxDocs=44421)
                0.017219115 = queryNorm
              1.3254049 = fieldWeight in 6599, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.482592 = idf(docFreq=24, maxDocs=44421)
                0.15625 = fieldNorm(doc=6599)
          1.0033947 = weight(title_txt:datenbanksysteme in 6599) [ClassicSimilarity], result of:
            1.0033947 = score(doc=6599,freq=1.0), product of:
              0.22628911 = queryWeight, product of:
                1.4818856 = boost
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.017219115 = queryNorm
              4.4341273 = fieldWeight in 6599, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.5 = fieldNorm(doc=6599)
          0.10253081 = weight(abstract_txt:mehr in 6599) [ClassicSimilarity], result of:
            0.10253081 = score(doc=6599,freq=1.0), product of:
              0.13532001 = queryWeight, product of:
                1.6206112 = boost
                4.849225 = idf(docFreq=945, maxDocs=44421)
                0.017219115 = queryNorm
              0.7576914 = fieldWeight in 6599, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.849225 = idf(docFreq=945, maxDocs=44421)
                0.15625 = fieldNorm(doc=6599)
        0.12 = coord(3/25)
    
  4. Kießling, W.; Köstler, G.: Multimedia-Kurs Datenbanksysteme (1998) 0.14
    0.13791676 = sum of:
      0.13791676 = product of:
        1.1493063 = sum of:
          0.08638576 = weight(abstract_txt:umfassende in 4076) [ClassicSimilarity], result of:
            0.08638576 = score(doc=4076,freq=1.0), product of:
              0.13468204 = queryWeight, product of:
                1.1432407 = boost
                6.8416553 = idf(docFreq=128, maxDocs=44421)
                0.017219115 = queryNorm
              0.64140517 = fieldWeight in 4076, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8416553 = idf(docFreq=128, maxDocs=44421)
                0.09375 = fieldNorm(doc=4076)
          1.0033947 = weight(title_txt:datenbanksysteme in 4076) [ClassicSimilarity], result of:
            1.0033947 = score(doc=4076,freq=1.0), product of:
              0.22628911 = queryWeight, product of:
                1.4818856 = boost
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.017219115 = queryNorm
              4.4341273 = fieldWeight in 4076, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.5 = fieldNorm(doc=4076)
          0.059525874 = weight(abstract_txt:eine in 4076) [ClassicSimilarity], result of:
            0.059525874 = score(doc=4076,freq=3.0), product of:
              0.10507162 = queryWeight, product of:
                1.7489854 = boost
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.017219115 = queryNorm
              0.56652665 = fieldWeight in 4076, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.09375 = fieldNorm(doc=4076)
        0.12 = coord(3/25)
    
  5. Conrad, S.: Föderierte Datenbanksysteme : Konzepte der Datenintegration (1997) 0.13
    0.13394485 = sum of:
      0.13394485 = product of:
        1.1162071 = sum of:
          0.19241379 = weight(abstract_txt:datenbestände in 214) [ClassicSimilarity], result of:
            0.19241379 = score(doc=214,freq=1.0), product of:
              0.18961814 = queryWeight, product of:
                1.3565093 = boost
                8.117949 = idf(docFreq=35, maxDocs=44421)
                0.017219115 = queryNorm
              1.0147436 = fieldWeight in 214, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.117949 = idf(docFreq=35, maxDocs=44421)
                0.125 = fieldNorm(doc=214)
          0.87797034 = weight(title_txt:datenbanksysteme in 214) [ClassicSimilarity], result of:
            0.87797034 = score(doc=214,freq=1.0), product of:
              0.22628911 = queryWeight, product of:
                1.4818856 = boost
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.017219115 = queryNorm
              3.8798614 = fieldWeight in 214, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.4375 = fieldNorm(doc=214)
          0.045823038 = weight(abstract_txt:eine in 214) [ClassicSimilarity], result of:
            0.045823038 = score(doc=214,freq=1.0), product of:
              0.10507162 = queryWeight, product of:
                1.7489854 = boost
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.017219115 = queryNorm
              0.4361124 = fieldWeight in 214, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4888992 = idf(docFreq=3686, maxDocs=44421)
                0.125 = fieldNorm(doc=214)
        0.12 = coord(3/25)