Join Bill Weinman for an in-depth discussion in this video Returning parts of a string, part of PostgreSQL 9 with PHP Essential Training.
Postgres has several standard functions for operating on parts of the string.…For example, if I type in here SELECT POSITION ('string' IN 'This is a string');…we will get the number of characters in from the beginning where that substring…is found inside the larger string and we see that it's 11.…Likewise, I can say SELECT SUBSTRING( 'This is a string' FROM 11); and so that…will start 11 characters in and give me the rest of the string which we now know…is a string, that says string.…
Or I can add to this I can say FOR 3 and it will just give me three…characters starting out of 11.…So I will get just str.…So these are very standard functions.…These are common in all the major database systems and they work pretty much the…same across the board.…
- Installing PostgreSQL
- Understanding database architecture
- Inserting, updating, and deleting data in a table
- Creating a database library
- Indexing ID fields
- Storing numbers, text, and Boolean values
- Reading data
- Using casts to force type
- Using mathematical functions
- Concatenating strings
- Working with date and time functions and operators
- Defining CRUD
- Using PHP to insert, read, update, and delete rows in a database
Skill Level Beginner
1. Quick Start
2. Creating a Database
3. Data Types
4. Storing and Reading Data
5. SQL Expressions
6. Mathematical Functions and Operators
Using math functions3m 2s
7. String Functions and Operators
8. Date and Time Functions and Operators
9. PHP Interfaces
10. Web Applications
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.