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How to find duplicate rows in Sql or Mysql
You can find duplicate rows in the mysql table, just use below select query, to find duplicate rows in Oracle, Sql, Mysql, DB2. SELECT columnName, COUNT(*) as countFROM selectedTableGROUP BY columnNameHAVING COUNT(*) > 1; You came from below query:how to find duplicate rows in sql server 2008how to find duplicate rows in sql and deletehow […]
MySQL Offset Limit Data Selections
MySQL provides a LIMIT clause that is used to specify the number of records to return. The LIMIT clause makes it easy to code multi page results or pagination with SQL, and is very useful on large tables. Assume we wish to select all records from 1 – 30 (inclusive) from a table called “Orders”. […]
10 Mistakes Which PHP MySQL Developers Make
1. Using MyISAM rather than InnoDB MySQL has a number of database engines, but you’re most likely to encounter MyISAM and InnoDB. MyISAM is used by default. However, unless you’re creating a very simple or experimental database, it’s almost certainly the wrong choice! MyISAM doesn’t support foreign key constraints or transactions, which are essential for […]