This section briefly describes five data types in SQL: numeric, text, numeric, logical, and date.
Character Type
Varchar and char
The differences between varchar and char data are subtle, but important. They are used to store strings of less than 255
Data | The data type SQL92 standard defines several basic data types, which are the basis for various data types in the SQL database. In the article "string data type", we have discussed in detail the string data types defined by the SQL92 standard.
Decimal (numeric) synonymous for precise storage of numeric valuesfloat and real cannot store values accuratelyThe decimal data type can store up to 38 digits, and all numbers can be placed to the right of the decimal point. The decimal data type
The SQL92 standard defines several basic data types, which are the basis for various data types in the SQL database. In the article "string data type", we have discussed in detail the string data types defined by the SQL92 standard. Now let's
Comparison of NUMERIC and DECIMAL types in Mysql, numericdecimal
Decimal (numeric) is synonymous and used to precisely store values.
A decimal data type can store up to 38 numbers. All numbers can be placed on the right of the decimal point. The
Decimal (numeric) synonymous with the exact storage of numeric values.
The decimal data type can store up to 38 digits, and all numbers can be placed to the right of the decimal point. The decimal data type stores an accurate (accurate) numeric
Type mappingHttps://docs.microsoft.com/en-us/dotnet/framework/data/adonet/sql-server-data-type-mappingsC # KeywordsdecimalHttps://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/decimalThe decimal keyword indicates a 128-bit data
1. The round () function is used in rounding. The first parameter is the data to be operated, and the second parameter is used to display the number of decimal places after rounding.
2.The numeric function has two parameters. The first parameter
Decimal (numeric) synonymous, used to store numeric values accurately.The decimal data type can store up to 38 digits, and all numbers can be placed to the right of the decimal point. The decimal data type stores an accurate (precise) representation
Unlike programming languages such as C #, Java, in SQL Server, the initial value of a numeric type such as int is null, and the assignment operator can be assigned null, and a variable with a value of NULL cannot display its value in the message bar,
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