"SELECT * FROM..." VS "SELECT ID FROM..." Performance
55584
select * vs select column
82390
Mysql int vs varchar as primary key (InnoDB Storage Engine?
5208
Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
16107
JOIN queries vs multiple queries
17367
Fluent and Query Expression — Is there any benefit(s) of one over other?
16178
SQL JOIN - WHERE clause vs. ON clause
17013
Difference between different types of SQL?
72529
Why insert-select to variable table from XML variable so slow?
84825
In SQL, what's the difference between count(column) and count(*)?
8316
Do frequent DML operations on a table with indexes and huge data affect SELECT query performance?
149623
How to improve the performance of this select query?
118877
Dynamic Server Name in SQL Statements (from clause)
11936
Insert into ... values ( SELECT ... FROM ... )
19860
Using a variable in a SELECT statement?
1408
SQL JOIN vs IN performance?
58304
Why are queries parsed in such a way that disallows the use of column aliases in most clauses?
130567
Difference between INNER JOIN and WHERE?