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https://dev.mysql.com/doc/refman/9.7/en/date-and-time-functions.html
When unix_timestamp is a decimal value, the fractional seconds precision of the DATETIME is the same as the precision of the decimal value, up to a maximum of 6. The return value is an integer if no argument is given or the argument does not include ... This section describes the functions that can be used to manipulate temporal ...
https://dev.mysql.com/doc/refman/9.7/en/storage-requirements.html
InnoDB Table Storage Requirements NDB Table Storage Requirements Numeric Type Storage Requirements Date and Time Type Storage Requirements String Type Storage Requirements Spatial Type Storage Requirements JSON Storage Requirements The storage ...
https://dev.mysql.com/doc/refman/9.7/en/other-vendor-data-types.html
To facilitate the use of code written for SQL implementations from other vendors, MySQL maps data types as shown in the following table. These mappings make it easier to import table definitions from other database systems into MySQL. If you create ...
https://dev.mysql.com/doc/refman/9.7/en/create-function-loadable.html
CREATE [AGGREGATE] FUNCTION [IF NOT EXISTS] function_name RETURNS {STRING|INTEGER|REAL|DECIMAL} SONAME shared_library_name This statement loads the loadable function named function_name. DECIMAL is a legal value after RETURNS, but currently DECIMAL ...(CREATE FUNCTION is also used to created stored functions; see Section 15.1.22, “CREATE PROCEDURE and CREATE FUNCTION Statements”.) A loadable function is a way to extend MySQL with a new function that works like a native (built-in) MySQL function such as ABS() or ...
https://dev.mysql.com/doc/refman/9.7/en/built-in-function-reference.html
The following table lists each built-in (native) function and operator and provides a short description of each one. For a table listing functions that are loadable at runtime, see Section 14.2, “Loadable Function Reference”. ->> Return value ...
https://dev.mysql.com/doc/refman/9.7/en/date-and-time-literals.html
1 row in set (0.00 sec) The only delimiter recognized between a date and time part and a fractional seconds part is the decimal point. The fractional part should always be separated from the rest of the time by a decimal point; no other fractional ... Standard SQL and ODBC Date and Time Literals String and Numeric Literals in Date and Time Context Date and time values can be represented in several formats, such as quoted strings or as numbers, depending on the exact type of the value and other ...
https://dev.mysql.com/doc/refman/9.7/en/precision-math-rounding.html
This section discusses precision math rounding for the ROUND() function and for inserts into columns with exact-value types (DECIMAL and integer). The ROUND() function rounds differently depending on whether its argument is exact or approximate: ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-functions.html
The string contains the number of bytes rounded to 2 decimal places and a minimum of 3 significant digits. The string contains the decimal time rounded to 2 decimal places and a minimum of 3 significant digits. MySQL includes built-in SQL functions ...
https://dev.mysql.com/doc/refman/9.7/en/expressions.html
This section lists the grammar rules that expressions must follow in MySQL and provides additional information about the types of terms that may appear in expressions. Expression Syntax Expression Term Notes Temporal Intervals Expression Syntax The ...
https://dev.mysql.com/doc/refman/9.7/en/precision-math-numbers.html
The scope of precision math for exact-value operations includes the exact-value data types (integer and DECIMAL types) and exact-value numeric literals. The DECIMAL data type is a fixed-point type and calculations are exact. In MySQL, the DECIMAL ...Approximate-value data types and numeric literals are handled as floating-point ...