ODBC uses two sets of data types: SQL data types and C data types. SQL data types are used in the data source, and C data types are used in C code in the application.This section contains the following topic.Type Identifiers SQL Data Types in ODBC C Data Types in ODBC Data Type...
ODBC C data types indicate the data type of C buffers used to store data in the application. All drivers must support all C data types. This is required because all drivers must support all C types to which SQL types that they support can be converted, and all drivers support at least ...
std::string extra_json = "{\"channel\":\"QQ\",\"channelID\":2,\"channelOpenID\":\"\",\"pluginData\":{\"code\":\"xxx\",\"redirect_uri\":\"xxx\",\"msdk_qq_login_use_code\":1}}"; MSDKLogin::Login("", "", "", extra_json.c_str()); 或 std::string extra_json =...
the linked data type, Stocks, is used in cells A2 through A11. Then in columns B and C, there are formulas that extract more information from the Stocks data type in column A.
This section discusses the characteristics of theDECIMALdata 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 ofDECIMALcolumns ...
Table 1 : The instruction set data typeData typeDescription Eint8 sign extended 8-bit integer Euint16 zero extended 16-bit unsigned integer EFWord sign extended 16-bit signed integer that describes a quantity in FUnits, the smallest measurable unit in the em space EF2Dot14 sign extended 16...
The data types listed in the SQL Data Types and C Data Types sections earlier in this appendix are "concise" data types: Each identifier refers to a single data type. There is a one-to-one correspondence between the identifier and the data type. Descriptors, however, do not in all cases...
Thechartype is implicitly convertible to the followingintegraltypes:ushort,int,uint,long,ulong,nint, andnuint. It's also implicitly convertible to the built-infloating-pointnumeric types:float,double, anddecimal. It's explicitly convertible tosbyte,byte, andshortintegral types. ...
11.3.1 String Data Type Syntax The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and SET. In some cases, MySQL may change a string column to a type different from that given in a CREATE TABLE or ALTER TABLE statement. See Section 13.1.18.6, “Silent ...