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Rechercher dans le manuel MySQL
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https://dev.mysql.com/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/func-op-summary-ref.html
GTID_SUBTRACT() Return all GTIDs in set that are not in subset. JSON_CONTAINS() Whether JSON document contains specific object at path JSON_CONTAINS_PATH() Whether JSON document contains any data at path JSON_DEPTH() Maximum depth of JSON document ...
https://dev.mysql.com/control-flow-functions.html
Otherwise, if at least one argument is DECIMAL, the result is DECIMAL. The second syntax returns the result for the first condition that is true. If no comparison or condition is true, the result after ELSE is returned, or NULL if there is no ELSE ...
https://dev.mysql.com/create-function-udf.html
CREATE [AGGREGATE] FUNCTION function_name RETURNS {STRING|INTEGER|REAL|DECIMAL} SONAME shared_library_name A user-defined function (UDF) is a way to extend MySQL with a new function that works like a native (built-in) MySQL function such as ABS() ...function_name is the name that should be used in SQL statements to invoke the ...
https://dev.mysql.com/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. As of MySQL 8.0.16, MySQL includes ...
https://dev.mysql.com/date-and-time-literals.html
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 seconds delimiter is ...
https://dev.mysql.com/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 ...
https://dev.mysql.com/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/replication-features-floatvalues.html
With statement-based replication, values are converted from decimal to binary. Because conversions between decimal and binary representations of them may be approximate, comparisons involving floating-point values are inexact. This is true for ...
https://dev.mysql.com/numeric-types.html
These types include the exact numeric data types (INTEGER, SMALLINT, DECIMAL, and NUMERIC), as well as the approximate numeric data types (FLOAT, REAL, and DOUBLE PRECISION). The keyword INT is a synonym for INTEGER, and the keywords DEC and FIXED ...MySQL treats DOUBLE as a synonym for DOUBLE PRECISION (a nonstandard ...
Document created the 26/06/2006, last modified the 26/10/2018
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