Applications may need to work based on different databases. Although the SQL syntax for various databases is generally consistent, differences still exist, which necessitates modifications to related ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

select a.*, decode(a.total, 0, 0, a.pass / a.total * 100) "passRate", decode(a.total, 0, 0, (a.pass + a.unpass) / a.total * 100) "finRate" from (select "regorgCode ...

Statement level is the lowest level of granularity to fail or succeed upon. If you have in your example 100 records in table A to update based upon some logic (e.g. from another table, from a custom ...

A database consists of one or more tables. A table is identified by its name. A table is made up of columns and rows. Columns contain the column name and data type. Rows contain the records or data ...

Well, if you happen to be using Sql Server you can do that sort of thing in T-Sql. In Oracle, you can also accomplish the same thing using pl/sql. Either way i'd do it in a stored ...