Variable-length character string contains data in Unicode format. VARCHAR VARCHAR Value number Stores numbers with a precision of up to 38 digits. DECIMAL NUMERIC binary_float 2-bit single-precision floating point number FLOAT FLOAT8 binary_double 64-bit double-precision floating point number DOUBLE...
Each subclass stores the type of geometry implied by its name; for instance, ST_MultiPoint stores multipoints. A list of the subclasses and their descriptions are in the following table: SubtypeDescription ST_Point A zero-dimensional geometry that occupies a single location in coordinate space....
[DocumentFormat.OpenXml.ChildElementInfo(typeof(DocumentFormat.OpenXml.Spreadsheet.VolatileType))] [DocumentFormat.OpenXml.ChildElementInfo(typeof(DocumentFormat.OpenXml.Spreadsheet.ExtensionList))] public class VolatileTypes : DocumentFormat.OpenXml.OpenXmlPartRootElement 继承 Object OpenXmlElement OpenXmlCo...
SQL - Having Clause SQL - AND & OR SQL - BOOLEAN (BIT) Operator SQL - LIKE Operator SQL - IN Operator SQL - ANY, ALL Operators SQL - EXISTS Operator SQL - CASE SQL - NOT Operator SQL - NOT EQUAL SQL - IS NULL SQL - IS NOT NULL SQL - NOT NULL SQL - BETWEEN Operator SQL -...
NATIONAL CHAR (or its equivalent short form, NCHAR) is the ANSI SQL way to define that a CHAR column should use the default CHARACTER set. This is the default in MySQL. CHAR is shorthand for CHARACTER. MySQL allows you to create a column of type CHAR(0). This is mainly useful when ...
In some cases, MySQL may change a string column to a type different from that given in a CREATE TABLE or ALTER TABLE statement. For definitions of character string columns (CHAR, VARCHAR, and the TEXT types), MySQL interprets【ɪnˈtɜːrprəts诠释;说明;把…理解为;领会;口译;】...
Different types of Indexes exist in SQL Clustered Index Clustered indexes sort and store rows data in a table or view based on their fundamental values. There might be a case of having only one clustered index in each table, as it can enable the user to store data in a single order. Ga...
Every expression that is used in an expression element or as an argument to an RDL function MUST return one of the following RDL data types:String([XMLSCHEMA2/2]section 3.2.1),Boolean([XMLSCHEMA2/2] section 3.2.2),Float([XMLSCHEMA2]section 3.2.4),DateTime([XMLSCHEMA2] section 3.2.7...
24, the data type becomes FLOAT with no M or D values. If p is from 25 to 53, the data type becomes DOUBLE with no M or D values. The range of the resulting column is the same as for the single-precision FLOAT or double-precision DOUBLE data types described earlier in this ...
SELECTa=bfromt2;?column?---t(1row)SELECTcast(aastext)asval,lengthb(val)FROMt2;val|lengthb---+---abc|3(1row) Bytes and Characters nmeans differently inVARCHAR2(n)andNVARCHAR2(n). InVARCHAR2(n)nindicates the number of bytes. InNVARCHAR2(n),nindicates...