67 lines
2.9 KiB
Plaintext
67 lines
2.9 KiB
Plaintext
| 2019-09-16 |
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| M.R.Llave |
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+-----------------------------------------------------------------------------------------------+
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|2¹¹ |2¹⁰ |2⁹ |2⁸ |2⁷ |2⁶ |2⁵ |2⁴ |2³ |2² |2¹ |2⁰ |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|2048 |1024 |512 |256 |128 |64 |32 |16 |8 |4 |2 |1 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |1 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |1 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |1 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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|0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |0 |1 |
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+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
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525 = 0 1 0 0 0 0 0 1 1 0 1
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=================================================================================================
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8 golden rules of user interfaces
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+--------------------------------------+
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Consitency
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Shortcuts
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Informational feedback
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Finish
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Easy troubleshooting
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Reverse actions
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Support user-control
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Avoid overloading the users shorttime memory
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==================================================================================================
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DBMS, DDL and DML
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DataBase Management Systems
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mySQL, MS Access, postgres, mariaDB, Oracle
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Data Definition Language
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mySQL, xml schema
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Data Manipulation Language
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sql, pl/sql, sql_pl
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----------------------
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Database in normalform
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1 primary key per cell
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Can't be divided further
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Every attribute that is not keys, are generally independent of each other.
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