sql-update – Read For Learn

MySQL – UPDATE query with LIMIT

When dealing with null, = does not match the null values. You can use IS NULL or IS NOT NULL LIMIT can be used with UPDATE but with the row count only

Update query using Subquery in Sql Server

you can join both tables even on UPDATE statements, SQLFiddle Demo for faster performance, define an INDEX on column marks on both tables. using SUBQUERY SQLFiddle Demo

Find out the history of SQL queries

An update SQL query was executed on the server, which caused many problems later. How can I get the list of update queries executed in last 2 months, so that I can trace the exact problematic SQL query?

ORA-01779: cannot modify a column which maps to a non key-preserved table

A DML table expression clause is only useful when you need columns from more than one table. In your case, you can use a regular update with an EXISTS: If you really do need to use columns from both tables you have three options: repeat the join in the SET and the WHERE clause. This is easy to build but …

how to increment integer Columns value by 1 in SQL

My questions is how to increment a column’s value by 1. For example, suppose a column ID has values 1,2,3,4, .. Now when I update this table then ID column should increment by 1, Now ID will become 2,3,4,5, ..

I want to use CASE statement to update some records in sql server 2005

Add a WHERE clause

updating table rows in postgres using subquery

Postgres allows: This syntax is not standard SQL, but it is much more convenient for this type of query than standard SQL. I believe Oracle (at least) accepts something similar.