1. Query Methods
Where Clauses
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2. All – most - some ... ALL : Define the term SQL
MOST : Describe the syntax for using WHERE clauses
SOME : Explain how to use operators with WHERE clauses
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What is a Database?
INSERT Statements
UPDATE Statements
Thought board
What is SQL?
DELETE Statements

4. What is a Database ..?
A database is just a collection of data A simple database could be a computing text book
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5. What is a Database ..?
Data about each topic is stored in the book The data is organised into chapters You can search for a topic using the content and index pages
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6. What is a Database ..?
Organisations have data that they need to store, collate and analyse 30 years ago this data would have been stored in a filing cabinet
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7. What is a Database ..?
Modern organisations use computer systems to store, collate and analyse data These systems are called Databases
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8. What is SQL ..?
SQL (Structured Query Language) is used to search through and manage databases SQL is written as statements that are executed by the database
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9. What is SQL ..?
SQL statements can be used to perform the following tasks …
Execute queries against a database
Retrieve data from a database
Insert records in a database
Update records in a database
Delete records from a database
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10. Insert Statements …
The INSERT INTO statement is used to insert new records in a table
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11. Insert Statements …
You can write the INSERT INTO statement in two forms … The first form does not specify the column names only the values
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12. What do you think this SQL statement will do?
Insert Statements …
Think about this SQL statement … INSERT INTO table_name VALUES (value1,value2,value3,...);
What do you think this SQL statement will do?
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13. Insert Statements …
You can write the INSERT INTO statement in two forms … The second form specifies both the column names and the values
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14. What do you think this SQL statement will do?
Insert Statements …
Think about this SQL statement … INSERT INTO table_name (column1,column2,column3,..) VALUES(value1,value2,value3,..);
What do you think this SQL statement will do?
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15. What do you think this SQL statement will do?
Insert Statements …
Think about this SQL statement … INSERT INTO Customers (CustomerName, ContactName, Address, City, PostalCode, Country) VALUES ('Cardinal','Tom Holland',‘47 Main Street',‘Hinckley',‘LE16 5UT',’UK');
What do you think this SQL statement will do?
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16. What do you think this SQL statement will do?
Insert Statements …
Think about this SQL statement … INSERT INTO Customers (CustomerName, City, Country) VALUES ('Cardinal', ‘Hinckley', ‘UK');
What do you think this SQL statement will do?
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17. Update Statements …
The UPDATE statement is used to update records in a table UPDATE table_name SET column1=value1,column2=value2,... WHERE column3=value;
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18. What do you think this SQL statement will do?
Update Statements …
Think about this SQL statement … UPDATE Customers SET Job_Title=’Director', Business_Phone='(0123) ' WHERE Company=‘XYZ Ltd';
What do you think this SQL statement will do?
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19. Delete Statements …
The DELETE statement is used to delete records in a table DELETE FROM table_name WHERE some_column=some_value;
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20. What do you think this SQL statement will do?
Delete Statements …
Think about this SQL statement … DELETE FROM Customers WHERE CustomerName=‘XYZ Ltd' AND ContactName=Peter Smith';
What do you think this SQL statement will do?
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21. Deletes data from a table
Thought Board …
INSERT
Updates data in a table
UPDATE
Deletes data from a table
DELETE
Adds new data to a table
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