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Spatial Databases and Data Management Software, Connections and Passwords Table of Contents Software ………………………………………………………………………………………………………………… 2 PG Admin 4 ………………………………………………………………………………………………………… 2 QGIS 2.18…………………………………………………………………………………………………………… 2 FME …………………………………………………………………………………………………………………… 2 UCL VPN ……………………………………………………………………………………………………………. 2 Connecting to Desktop Anywhere in Birkbeck …………………………………………………………….. 3 Connecting to PG Admin IV ……………………………………………………………………………………… 3 Changing Your Password ………………………………………………………………………………………… 5 Note: you will be using […]

SQL: Queries, Constraints, Triggers SQL Nested Queries CS430/630 Lecture 6 Slides based on “Database Management Systems” 3rd ed, Ramakrishnan and Gehrke Nested Queries  An SQL query can be used to help the evaluation of another query  E.g., a condition may need to be evaluated on a computed relation, not one readily available 

SQL: Queries, Constraints, Triggers SQL Division CS430/630 Lecture 7 Slides based on “Database Management Systems” 3rd ed, Ramakrishnan and Gehrke Division  Used to answer queries such as: Find sailors who have reserved all boats.  Let A have 2 fields, x and y; B have only field y:  A/B =  A/B contains

Microsoft PowerPoint – Spatial Data Management – Week 8 – Advanced Topics 2 – Improving Performance Week 8 – Advanced Topics 2 Improving Database Performance Dr Claire Ellul c.ellul@ucl.ac.uk Spatial Data Management • Overview – Indexing – Normalisation and De-Normalisation – Query Parsing Indexes • Indexes – Provide accelerated access to data by reducing the

SQL: Queries, Constraints, Triggers Null Values. SQL Constraints CS430/630 Lecture 10 Slides based on “Database Management Systems” 3rd ed, Ramakrishnan and Gehrke Null Values  Field values in a tuple may sometimes be  unknown: e.g., a rating has not been assigned, or a new column is added to the table  inapplicable: e.g., CEO

COMP284 Practical 5 PHP (2) Introduction • This worksheet contains further exercises that are intended to familiarise you with PHP Pro- gramming. In particular, we will consider the use of the PHP Data Objects (PDO) extension for accessing databases that is independent of the specific DBMS that is used. This is of- ten preferable over