| 题目 |
题目类型 |
操作 |
| Table structure data analysis tools do not generat... |
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| Regarding precautions when using table structure d... |
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| Horizontally merging multiple tables and enriching... |
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| ETL plays an important role in the process of tabl... |
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| When horizontally merging multiple data source tab... |
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| An unlikely join relationship when horizontally me... |
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| Relational databases play an important role in sys... |
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| The multi-dimensional data model is a data organiz... |
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| Pivot analysis is an important method in descripti... |
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| Pivot analysis summarizes dimensions against measu... |
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| After inner join on tables student1 and student2, ... |
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| To associate data from different tables, horizonta... |
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| In a relational database, the smallest storage uni... |
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| There are several methods for deleting data from t... |
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| Analyst A wants to query for products with names c... |
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| Integrity constraints prevent non-compliant data f... |
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| When adding data to a database table, you must be ... |
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| SQL can be divided into Data Definition Language, ... |
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| In SQL commands, after DELETE FROM, the following ... |
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| Data in databases should not be arbitrarily modifi... |
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