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The SQL SELECT statement returns a result set of rows, from one or more tables. [1] [2] A SELECT statement retrieves zero or more rows from one or more database tables or database views. In most applications, SELECT is the most commonly used data manipulation language (DML) command.
In SELECT statements SQL returns only results for which the WHERE clause returns a value of True; i.e., it excludes results with values of False and also excludes those whose value is Unknown. Along with True and False, the Unknown resulting from direct comparisons with Null thus brings a fragment of three-valued logic to SQL.
MariaDB is a MySQL fork. Virtual columns were added in the 5.2 tree. [3] Expressions that can be used to compute the virtual columns have the following limitations: They must be deterministic; They cannot return constant values; They cannot use user-defined functions or stored procedures; They cannot include other virtual columns
Reserved words in SQL and related products In SQL:2023 [3] In IBM Db2 13 [4] In Mimer SQL 11.0 [5] In MySQL 8.0 [6] In Oracle Database 23c [7] In PostgreSQL 16 [1] In Microsoft SQL Server 2022 [2]
Stored procedures may return result sets, i.e., the results of a SELECT statement. Such result sets can be processed using cursors, by other stored procedures, by associating a result-set locator, or by applications. Stored procedures may also contain declared variables for processing data and cursors that allow it to loop through multiple rows ...
A man from Memphis, Tennessee, has been found guilty by a judge in Fiji of murdering his wife during their honeymoon in 2022, the prosecutor’s office said Monday.
Eva Longoria is enjoying some R&R with her family over the holidays.. On Friday, Dec. 27, the actress, 49, shared a carousel of photos on Instagram from a recent trip alongside her husband José ...
MySQL (/ ˌ m aɪ ˌ ɛ s ˌ k juː ˈ ɛ l /) [5] is an open-source relational database management system (RDBMS). [5] [6] Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, [7] and "SQL", the acronym for Structured Query Language.