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https://dev.mysql.com/doc/refman/8.0/en/precision-math-decimal-characteristics.html
This section discusses the characteristics of the DECIMAL data type (and its synonyms), with particular regard to the following topics: Maximum number of digits Storage format Storage requirements The nonstandard MySQL extension to the upper range ...The ranges of values for the arguments are as follows: M is the maximum number of digits (the ...
https://dev.mysql.com/doc/refman/8.0/en/fixed-point-types.html
The DECIMAL and NUMERIC types store exact numeric data values. In MySQL, NUMERIC is implemented as DECIMAL, so the following remarks about DECIMAL apply equally to NUMERIC. In a DECIMAL column declaration, the precision and scale can be (and ...
https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html
FORMAT(X,D) Formats the number X to a format like '#,###,###.##', rounded to D decimal places, and returns the result as a string. HEX(N_or_S) This function can be used to obtain a hexadecimal representation of a decimal number or a string; the ...
https://dev.mysql.com/doc/refman/8.0/en/constant-folding-optimization.html
If the constant is one of the decimal types (such as DECIMAL, REAL, DOUBLE, or FLOAT) and has a nonzero decimal portion, it cannot be equal; fold accordingly. A REAL value that is too small to be represented as DECIMAL is rounded to .01 or -.01 ...
https://dev.mysql.com/doc/refman/8.0/en/numeric-type-syntax.html
As of MySQL 8.0.17, the UNSIGNED attribute is deprecated for columns of type FLOAT, DOUBLE, and DECIMAL (and any synonyms); you should expect support for it to be removed in a future version of MySQL. M is the total number of digits (the precision) ... For integer data types, M indicates the minimum display ...
https://dev.mysql.com/doc/refman/8.0/en/precision-math-expressions.html
In strict SQL mode, for INSERT into a column with an exact data type (DECIMAL or integer), a number is inserted with its exact value if it is within the column range. If any exact value contains a fractional part (a value following the decimal ...
https://dev.mysql.com/doc/refman/8.0/en/precision-math-examples.html
Rounding for exact-value columns (DECIMAL and integer) and exact-valued numbers uses the “round half away from zero” rule. Consider these statements: mysql> CREATE TABLE t (i INT, d DECIMAL, f FLOAT); mysql> INSERT INTO t VALUES(1,1,1); mysql> ... This section provides some examples that show precision math query results in ...
https://dev.mysql.com/doc/refman/8.0/en/cast-functions.html
For example, the following pairs of definitions are equivalent: CHAR(10) CHARACTER SET binary BINARY(10) VARCHAR(10) CHARACTER SET binary VARBINARY(10) TEXT CHARACTER SET binary BLOB If BINARY is invoked from within the mysql client, binary strings ... Table 14.15 Cast Functions and Operators Name Description Deprecated BINARY Cast a string to a binary string 8.0.27 CAST() Cast a value as a certain type CONVERT() Cast a value as a certain type Cast functions and operators enable conversion of values from one data type to ...
https://dev.mysql.com/doc/refman/8.0/en/type-conversion.html
Hexadecimal values are treated as binary strings if not compared to a number. If one of the arguments is a decimal value, comparison depends on the other argument. The arguments are compared as decimal values if the other argument is a decimal or ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-differing-tables.html
Between any of the decimal types DECIMAL, FLOAT, DOUBLE, and NUMERIC. A conversion from DECIMAL(M,D) to DECIMAL(M',D') where D' >= D and (M'-D') >= (M-D) is non-lossy; for any case where M' < M, D' < D, or both, only a lossy conversion can be made.