On Fri, Apr 6, 2018 at 9:35 AM, pinker <pinker@onet.eu> wrote:
Edson Carlos Ericksson Richter wrote > I don't know if there are best practices (each scenario requires its own > solution), but for plain complex SELECT queries, I do use "WITH" > queries... They work really well.
Often times, large queries like the example you have provided were written as a generic query to obtain information for an application. So developers should be cautioned to write queries that are specific to the data needed for each situation.
Objectively speaking, you should look at two main areas. First, examine the WHERE clause. Sometimes there are redundant restrictions which can be removed. Next, look at the columns that are selected. Are all those columns really needed? After you have cleaned the WHERE clause and columns, you may find it is no longer necessary to join so many tables.
On Fri, Apr 6, 2018 at 9:35 AM, pinker <pinker@onet.eu> wrote:
Edson Carlos Ericksson Richter wrote > I don't know if there are best practices (each scenario requires its own > solution), but for plain complex SELECT queries, I do use "WITH" > queries... They work really well.
