The obvious answer is to look at the SQL Server query execution time, but that alone isn’t always enough to determine that there is or isn’t an improvement – or if that new index is helping. If the query was already finishing in a second or 2 that just isn’t enough precision to...
In this guide, I’ll start with a discussion of SQL tuning and the basics of why it’s important; then I’ll set out six best practices for query tuning in Oracle, and how to make SELECT query faster in Oracle. This includes usingSolarWinds®Database Performance Analyzer (DPA)or a s...
On just 10 million rows, this query takes48 seconds. To understand why, let’s consult our handy SQL explain: It’s slow because the database is iterating over all the logs and all the dashboards, then joining them, then sorting them, all before getting down to real work of grouping ...
SQL ( Structured Query Language)is a mighty tool, and it serves the task of arranging and dealing with databases that work in a relational format. Be you one with expertise in databases like is experienced or a starter setting out to learn the ropes, it's of great importance that SQL qu...
By avoiding SELECT DISTINCT and using GROUP BY instead, you can optimize SQL queries and reduce the total query time from 198 to 62 msec which is more than 3 times faster. Avoid Using Loops Loops might cause your query to be slower since they force the database to go through the records...
Add empty row to Datagridview Add EncodingType to Nonce element on SOAP Message (WS-Security) Add fonts to resources file Add hexidecimal character to a string Add IList to IList Add Images to DatagridView Cell Add months to GETDATE() function in sql server Add new row to datagridview one...
Streamline your SQL Server tasks with this efficient and easy to follow tutorial on updating tables using SELECT statements.
Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a large (100 million rows) table with default constraint adding a extra column in a pivot table created uisng T-SQL Pivot Table query Adding a partition scheme to an existing table. Adding a Value to a 'date' Column...
This brings us to the last step of SQLite to SQL Server migration. Click on the linked server stem and expand it to the tables. You can then simply query the tables as follows: Select * from openquery(Mobile_Phone_DB_64 , 'select * from db_notes') GO You can make a table in your...
1. You can use SELECT with DISTINCT to find only the non-duplicate values from column “col1”: postgres=#selectdistinct(col1)fromtestorderbycol1;col1---1 2 3 (3 rows) 2. SELECT with DISTINCT can also be used in an SQL inline query: postgres...