From the official document ICAB4136A:
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Original image: 'php' http://www.flickr.com/photos/29174632@N00/145023802 by: Raphael Goetter "This unit defines the competency required to use a structured query language (SQL) to define, create and manipulate database structures and associated data in a relational database." Basically, that means ... (translate above into plain english)
You can read more about this unit on the National Training Information Systems Official document for ICAB4136A .
This unit forms part of the following qualifications:
How this unit will help you
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After learning and applying the skills required by this unit you'll be able to demonstrate your skills in:
ELEMENT
PERFORMANCE CRITERIA
1. Write a simple SQL statement to retrieve and sort data
Retrieve all the data from a single table
Retrieve data from specific columns in a single table
Use 'order by' to sort query output
2. Write an SQL statement that selectively retrieves data
Restrict the number of rows retrieved by placing criteria in the 'where' clause
Restrict the number of rows retrieved by placing specific criteria in the select statement
Use comparison operators in the 'where' clause to compare numeric, character, string, date and time data
Use Boolean operators with the correct precedence
Use criteria in the 'where' clause to check for a range of values, to select values from a list, and to check for values that match a pattern
Use SQL syntax to suppress duplicate values from query results
Take action to exclude null values from a query result
3. Write SQL statements that use functions
Use arithmetical operators with the correct precedence
Use string functions and operators to obtain the required query output
Use mathematical functions to obtain the required output, where required
Use date functions to obtain the required output
Use SQL aggregate functions to obtain the required output
4. Write SQL statements that use aggregation and filtering
Use 'group by' to aggregate data by multiple columns
Sort aggregated data in the query output
Filter aggregated data using the 'having' clause
5. Write SQL statements that retrieve data from multiple tables
Employ the inner join syntax to retrieve data from two or more tables
Use 'left outer', 'right outer' and 'full outer' syntax to join tables in the select statement
Use correct syntax in the 'where' clause to retrieve data from multiple tables
Write a union query that retrieves data from more than one table
6. Write and execute SQL sub queries
Construct single and nested sub-queries
Construct sub-queries that return a single row, and multiple rows
Use correlated sub-queries to retrieve required data
Write sub-queries that use aggregates
7. Create and manipulate tables
Identify required columns, data types, keys, relationships, indexes and constraints
Use relevant naming conventions for all database elements
Create tables that implement all required elements
Insert rows into tables
Update some or all of the data in a table
Add columns to a table
Modify a column within a table
Delete a column from a table
Delete rows from a table
0View detailed information regarding a table
1Delete tables with regard to referential integrity rules
8. Create and use views
Create views that satisfy information requirements
Use check constraints in a view
Retrieve, insert, update and delete data using a view
Drop a view from a database
9. Create and use stored procedures
Create and execute stored procedures that use SQL to retrieve, insert or modify data according to information requirements
Create and execute stored procedures that use one or more parameters
Drop a stored procedure from the database
Create and test database triggers that automate data management or perform specific required data-related functions
translate the above elements and performance criteria into plain English and summaries here... To find the 2nd max salary from your table -
1> Select Top 1*
from table-name
where salary < ( select max(salary) from table-name );
...
Ideas for demonstrating this unit
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The best way to demonstrate these skills is ...
If you are demonstrating this unit as part of a formal course, you might find that the unit is graded (meaning you can not only demonstrate your competence, but can also gain a credit or distinction). Your facilitator may already have set criteria that your college uses. If not, here are some ideas for possible credit/distinction activities that you can discuss with your facilitator:
Notes and discrepancies
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