Lab Sql

I have the code for a log in system almost done. I have it working that a user gets 3 attempts to l… Read more Php Lockout User After 3 Failed Log Ins For 10 Minutes

I'm using MySQL to store financial stuff, and using the data to build, among other things, regi… Read more "inverse" Limit?

I have found a way to select random rows from a table in this post. A suggestion is to use the foll… Read more How To Use Limit Keyword In Sql Server 2005?

I am trying to query a table in descending order based on its primary key column. Here is the query… Read more Mysql Order By Primary Key Dynamically In Desc Order

I have the posts table with 10k rows and I want to create pagination by that. So I have the next qu… Read more How To Improve Limit Clause In Mysql

I have MySQL Server version 5.1.53. I was looking for an hour to answer this question by myself. In… Read more Mysql Is Doing Subquery After Limit Syntax Possible? If Not, Why?

I have an error in this query, when the query returns zero rows. Error Number: 1064 You have an er… Read more Sql Limit Return 'zero' - 0 - Rows(in Php)

I'm getting Errors that ORDER by should come after UNION but i want these to queries ordered be… Read more Sql: Select With Union, Order By And Limit

I have the following Postgres query: SELECT array_agg('Esns'.id ) FROM public.'Esns… Read more Set Limit To Array_agg()

I have a table in SQL, it contains around 100 rows. I select it within PHP with SELECT * FROM table… Read more Limiting A Result Using Php, Without Using Limit Clause When Fetching Rows In Database Query?

I've certain situation that requires certain result set from MySQL query, let's see the cur… Read more Sql: Limit Rows Linked To Each Joined Row

I have very big database of customers. This query was ok before I added ORDER BY. How can I optimiz… Read more Why Is This Inner Join/order By Mysql Query So Slow?

I want to update rows in my table with starting from 1001 to next 1000. I tried with following quer… Read more MySQL - UPDATE Query With LIMIT

I have two tables. The second one references to the first one by m_id. Main table M_ID | M_FIELD … Read more Oracle: Left Join Very Big Table And Limit The Joined Rows To One With The Largest Field Value