0
Table walking is a method used in data analysis to systematically move through rows or columns of a table to extract or manipulate data. It involves iterating through each row or column to perform calculations, comparisons, or other operations. This technique is commonly used in data processing tasks such as filtering, sorting, or aggregating data in a structured format.
Add your answer:
Earn +20 pts
Explain the distinction between total and partial constraints?
Total constraints are those in which a table's existence requires the existence of an associated table in a particular defined relation between them. whereas Partial constraints are involved with the tables in which presence of one table is partial for the associated table.
What is database composition in database?
Composition is a term that comes from object oriented design. It is a relationship in which a number of parts comprise a whole, and these parts can only be part of one whole. There is no direct translation of this concept to database design, but there are some situations in the database world that represent the concept of composition. Field to record A record is composed of fields and these fields are part of only one record. When the record is removed, the fields are also removed. So, each field has a composition relation with its record. This means that when you store a collection (a comma separated list of names for example) in a database field, this is in fact a composition relationship. Record to record from other table If you want to create a composition relation between records from a table A and records from another table B, where A is the whole and B the parts you must ensure that 1. There is a one-to-many relationship between table A and B. This is done by adding a foreign key to table B. 2. That all part records in B are deleted when the whole record in table A is deleted. This can be done by setting ON DELETE CACADE on the foreign key relationship. 3. That the records in table B don't become part of another composition relationship. But this restriction cannot be enforced by the database to my knowledge.
What Symbol table in compiler?
what is symbol table in computer
What are the key element of system proposal?
1. Table of content 2. Executive Summary 3. Systems request 4. Work plan 5. Feasibility analysis 6. Requirements Definition 7. Use cases 8. Process model 9. Data model Appendices
What if you delete a database table?
click undo to restore the table
Why the improvement in Mendeleevs periodic table was made?
To understand the concept of Periodic Table
What is execution table?
explain the the functionality of execution table
Explain referential integrity constraints in terms of relational algebra?
Referential integrity is a database concept that ensures that relationships between tables remain consistent. When one table has a foreign key to another table, the concept of referential integrity states that you may not add a record to the table that contains the foreign key unless there is a corresponding record in the linked table. It also includes the techniques known as cascading update and cascading delete, which ensure that changes made to the linked table are reflected in the primary table. By Mehari Tewelde
What is periodic table made out of?
The periodic table of the elements is not a physical table, it is a concept. It is made out of thought.
Why improvement in Mendeleev's periodic table was made?
To understand the concept of Periodic Table
Why the improvement mendeleev periodic table was made?
To understand the concept of Periodic Table
Why do we need atoms?
According to modern Periodic Table Atomic numbers are the fundamentals in order to explain the properties of an atom.One thing more and that is the concept of isotopes also make the atomic masses less strong to explain atomic properties which has no effect on atomic numbers.
When calculating risk analysis what table covers the sum of your Value ratings?
table 3-13
What is the concept of tax table about?
The concept of a tax table is about displaying the amount of tax due based on the income received. It is laid out graphically so that it is easier to decipher than just information.
What is linear decoding in microprocessor?
explain vector table?
What command do you use on the What-If analysis button to define a range as a table?
form
Who is known for coming up with the concept of the periodic table?
Dmitri Mendeleev.
