Then, if the number of digits to the left of the decimal point exceeds the declared precision minus the declared scale, an error is raised. If the scale of a value to be stored is greater than the declared scale of the column, the system will round the value to the specified number of fractional digits. The maximum allowed precision when explicitly specified in the type declaration is 1000 NUMERIC without a specified precision is subject to the limits described in Table 8.2. If you're concerned about portability, always specify the precision and scale explicitly.) (The SQL standard requires a default scale of 0, i.e., coercion to integer precision. A column of this kind will not coerce input values to any particular scale, whereas numeric columns with a declared scale will coerce input values to that scale. Without any precision or scale creates a column in which numeric values of any precision and scale can be stored, up to the implementation limit on precision. The precision must be positive, the scale zero or positive. To declare a column of type numeric use the syntax: Integers can be considered to have a scale of zero.īoth the maximum precision and the maximum scale of a numeric column can be configured. So the number 23.5141 has a precision of 6 and a scale of 4. The scale of a numeric is the count of decimal digits in the fractional part, to the right of the decimal point. We use the following terms below: The precision of a numeric is the total count of significant digits in the whole number, that is, the number of digits to both sides of the decimal point. However, calculations on numeric values are very slow compared to the integer types, or to the floating-point types described in the next section. Calculations with numeric values yield exact results where possible, e.g., addition, subtraction, multiplication. It is especially recommended for storing monetary amounts and other quantities where exactness is required. The type numeric can store numbers with a very large number of digits. The following sections describe the types in detail. The numeric types have a full set of corresponding arithmetic operators and functions. The syntax of constants for the numeric types is described in Section 4.1.2. Up to 131072 digits before the decimal point up to 16383 digits after the decimal point The following example returns the negative of the BaseRate value for each employee in the dimEmployee table.-9223372036854775808 to +9223372036854775807 SELECT TOP (1) - ( - 17) FROM DimEmployee The following example returns the positive of a negative constant. Returning the positive of a negative constant The following example returns the negative of a positive constant. Returning the negative of a positive constant VariableValue NegativeValueĮxamples: Azure Synapse Analytics and Analytics Platform System (PDW) C. SELECT AS VariableValue, AS NegativeValue The following example changes a variable to a negative value. The following example sets a variable to a negative value. Returns the data type of numeric_expression, except that an unsigned tinyint expression is promoted to a signed smallint result. Is any valid expression of any one of the data types of the numeric data type category, except the date and time category. To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.
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