Top "Where-clause" questions

Does order of where clauses matter in SQL?

Let's say I have a table called PEOPLE having 3 columns ID, LastName, FirstName, none of these columns are indexed. LastName …

sql performance where-clause

Filter Table Before Applying Left Join

I have 2 tables, I want to filter the 1 table before the 2 tables are joined together. Customer Table: ╔══════════╦═══════╗ ║ Customer ║ State ║ ╠══════════╬═══════╣ ║ A ║ …

sql join filter where-clause

In SQL / MySQL, what is the difference between "ON" and "WHERE" in a join statement?

The following statements give the same result (one is using on, and the other using where): mysql> select * from …

sql mysql join where-clause

EF: Include with where clause

As the title suggest I am looking for a way to do a where clause in combination with an include. …

c# entity-framework include where-clause

In Haskell, when do we use in with let?

In the following code, the last phrase I can put an in in front. Will it change anything? Another question: …

haskell scope whitespace where-clause let

using CASE in T-SQL in the where clause?

Im trying to use case to vary the value im checking in a where clause but I'm getting the error: …

tsql case where-clause

SQL use column from subselect in where clause

I have a query that looks something like that: SELECT a, b, c, (SELECT d from B limit 0,1) as d …

mysql sql where-clause subquery

Is a JOIN faster than a WHERE?

Suppose I have two tables that are linked (one has a foreign key to the other): CREATE TABLE Document ( Id …

sql performance join where-clause

why would you use WHERE 1=0 statement in SQL?

I saw a query run in a log file on an application. and it contained a query like: SELECT ID …

sql database where-clause

Checking an input param if not Null and using it in where in SQL Server

What is the best way to include an input param in the WHERE clause but exclude it if it is …

sql-server sql-server-2008 null where-clause coalesce