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Display all the databases
show databases
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select a database
use databaseName
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view the tables in a database
show tables
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make a database
create database database_name;
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Creat a table
create table table_name (field_name field_type, field_name, field_type);
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difference between char, varchar, and text types
char and varchar required a certain number about (e.g. varchar(20)), text does not. Text is for large text, char is for tiny and unvariable text (male, female), for a large variety in length of text use varchar. The difference is memory allocation or in other words, speed.
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date format
year-month-date
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When you want positive integers only
int(10) unsigned
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View the table structure
describe table_name
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put data in the table
insert into tablename values (value1, value2, etc)
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insert only certain values
insert into tablename (value1, value3, etc) values (data1, data2, etc_data)
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What is enum?
a data type where you define specific values (eg. enum('m','f');
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