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1 cze 2023 · The Oracle TO_NUMBER function is used to convert a text value to a number value. It works similar to the TO_DATE and TO_CHAR functions but converts the values to a number. The function takes many different data types: BINARY_FLOAT. BINARY_DOUBLE. CHAR. VARCHAR2. NCHAR. NVARCHAR2.
TO_NUMBER converts expr to a value of NUMBER data type. expr can be any expression that evaluates to a character string of type CHAR, VARCHAR2, NCHAR, or NVARCHAR2, a numeric value of type NUMBER, BINARY_FLOAT, or BINARY_DOUBLE, or null. If expr is NUMBER, then the function returns expr.
27 lut 2009 · It seems that if you specify NUMBER alone, you get NUMBER(38, 127) where both 38 (precision) and 127 (scale) are the maximum possible. However, if you specify NUMBER(p) then you get NUMBER(p, 0) where the scale is zero.
This Oracle tutorial explains how to use the Oracle / PLSQL TO_NUMBER function with syntax and examples. The Oracle / PLSQL TO_NUMBER function converts a string to a number.
to_number converts a text type (or a binary_double) to a number. It is best to try and separate in your mind the concept of a number and the various ways you can present that number visually (eg leading zeros, comma thousand seperators etc) - the visual representation is not a number, it is text.
The TO_NUMBER function converts a formatted TEXT or NTEXT expression to a number. This function is typically used to convert the formatted numerical output of one application (which includes currency symbols, decimal markers, thousands group markers, and so forth) so that it can be used as input to another application. Return Value.
According to the Oracle documentation, creating a table with a column of ANSI type INT, Oracle will convert it to NUMBER(38). According to the same document, NUMBER(38) is supposed to be a NUMBER with a precision of 38 and a scale of 0. But in practice, I am seeing a NUMBER with data_precision set to NULL and a data_length set to 22.
