Databases

A query can be slow because it reads too many rows, repeats an operation many times or waits on work outside the part you measured. EXPLAIN ANALYZE he...

A successful import message does not establish that the backup contains everything the application needs. The wrong database may have been selected, s...

During an SQL import, ERROR 1062: Duplicate entry means a PRIMARY or UNIQUE key would be violated. It does not necessarily mean the same row appears t...

If a name such as “Çağrı” appears as garbled symbols, do not immediately run ALTER TABLE across the database. The value may have been stored incorrect...

An SQL dump that stops with Unknown collation: 'utf8mb4_0900_ai_ci' is not necessarily damaged. The destination may not recognize the comparison rule ...

You select an SQL backup, start the import, and receive a blank page or timeout several minutes later. Retrying immediately is tempting. However, the ...

A relational database management system (RDBMS) is the most commonly used database model for managing and querying structured data. RDBMS stores data ...

SQL (Structured Query Language) is the standard language used to manage and query relational databases. SQL provides various commands to add, update, ...

SQL (Structured Query Language) is the standard language used to manage and query relational databases. It provides commands to insert, update, delete...

SQL (Structured Query Language) is the standard language used for managing and querying relational databases. One of the most powerful features of SQL...