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https://dev.mysql.com/doc/refman/9.7/en/se-csv-limitations.html
All tables that you create using the CSV storage engine must have the NOT NULL attribute on all columns.
https://dev.mysql.com/doc/refman/9.7/en/select.html
SELECT [ALL | DISTINCT | DISTINCTROW ] [HIGH_PRIORITY] [STRAIGHT_JOIN] [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT] [SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS] select_expr [, select_expr] ... [into_option] [FROM table_references [PARTITION ...
https://dev.mysql.com/doc/refman/9.7/en/show-create-procedure.html
SHOW CREATE PROCEDURE proc_name This statement is a MySQL extension. It returns the exact string that can be used to re-create the named stored procedure. A similar statement, SHOW CREATE FUNCTION, displays information about stored functions (see ...
https://dev.mysql.com/doc/refman/9.7/en/show-engines.html
SHOW [STORAGE] ENGINES SHOW ENGINES displays status information about the server's storage engines. This is particularly useful for checking whether a storage engine is supported, or to see what the default engine is. For information about MySQL ...
https://dev.mysql.com/doc/refman/9.7/en/show-profile.html
Note The SHOW PROFILE and SHOW PROFILES statements are deprecated; expect them to be removed in a future MySQL release. Use the Performance Schema instead; see Section 29.19.1, “Query Profiling Using Performance Schema”. To control profiling, ...
https://dev.mysql.com/doc/refman/9.7/en/signal.html
SIGNAL provides error information to a handler, to an outer portion of the application, or to the client. Also, it provides control over the error's characteristics (error number, SQLSTATE value, message). Without SIGNAL, it is necessary to resort ...
https://dev.mysql.com/doc/refman/9.7/en/silent-column-changes.html
In some cases, MySQL silently changes column specifications from those given in a CREATE TABLE or ALTER TABLE statement. These might be changes to a data type, to attributes associated with a data type, or to an index specification. All changes are ...
https://dev.mysql.com/doc/refman/9.7/en/spatial-index-optimization.html
MySQL permits creation of SPATIAL indexes on NOT NULL geometry-valued columns (see Section 13.4.10, “Creating Spatial Indexes”). The optimizer checks the SRID attribute for indexed columns to determine which spatial reference system (SRS) to ...
https://dev.mysql.com/doc/refman/9.7/en/sql-prepared-statements.html
Using prepared statements with placeholders for parameter values has the following benefits: Less overhead for parsing the statement each time it is executed. Typically, database applications process large volumes of almost-identical statements, ...
https://dev.mysql.com/doc/refman/9.7/en/srjs-session-info.html
For general information about stored routines in MySQL, see Section 27.2, “Using Stored Routines”. The MLE component provides a number of loadable functions for working with MLE user sessions. These functions are listed and described here: ...