![]() ![]() Specifies the maximum display width (which is 255)Ī large integer. The size parameter specifies theĪ medium integer. The size parameter specifies the maximumĪ medium integer. ![]() Zero is considered as false, nonzero values are considered as true.Ī small integer. The size parameter can hold a value from 1 to 64. The number of bits per value is specified in size. You can list up to 64 values in a SET listĪ bit-value type. The values are sorted in the order you enter themĪ string object that can have 0 or more values, chosen from a list of If a value is inserted that is not in the list, a blank value will be inserted. You can list up to 65535 values in an ENUM list. Holds up to 4,294,967,295 bytes of dataĪ string object that can have only one value, chosen from a list of possible values. Holds a string with a maximum length of 4,294,967,295 charactersįor BLOBs (Binary Large Objects). Holds a string with a maximum length of 16,777,215 charactersįor BLOBs (Binary Large Objects). Holds a string with a maximum length of 65,535 bytesįor BLOBs (Binary Large Objects). Holds a string with a maximum length of 255 characters Parameter specifies the maximum column length in bytes.įor BLOBs (Binary Large Objects). Default is 1Įqual to VARCHAR(), but stores binary byte strings. Parameter specifies the column length in bytes. Length in characters - can be from 0 to 65535Įqual to CHAR(), but stores binary byte strings. The size parameter specifies the maximum string Size parameter specifies the column length in characters - can beĪ VARIABLE length string (can contain letters, numbers, and specialĬharacters). The following example is the same as the previous example, except a collection initializer is used to add elements to the collection.String Functions: ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER Numeric Functions: ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST LEAST LN LOG LOG10 LOG2 MAX MIN MOD PI POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions: ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DATE_SUB DAY DAYNAME DAYOFMONTH DAYOFWEEK DAYOFYEAR EXTRACT FROM_DAYS HOUR LAST_DAY LOCALTIME LOCALTIMESTAMP MAKEDATE MAKETIME MICROSECOND MINUTE MONTH MONTHNAME NOW PERIOD_ADD PERIOD_DIFF QUARTER SECOND SEC_TO_TIME STR_TO_DATE SUBDATE SUBTIME SYSDATE TIME TIME_FORMAT TIME_TO_SEC TIMEDIFF TIMESTAMP TO_DAYS WEEK WEEKDAY WEEKOFYEAR YEAR YEARWEEK Advanced Functions: BIN BINARY CASE CAST COALESCE CONNECTION_ID CONV CONVERT CURRENT_USER DATABASE IF IFNULL ISNULL LAST_INSERT_ID NULLIF SESSION_USER SYSTEM_USER USER VERSION SQL Server FunctionsĪ FIXED length string (can contain letters, numbers, and special characters). ![]() For more information, see Object and Collection Initializers. If the contents of a collection are known in advance, you can use a collection initializer to initialize the collection. The following example creates a list of strings and then iterates through the strings by using a foreach statement. The examples in this section use the generic List class, which enables you to work with a strongly typed list of objects. Implementing a Collection of Key/Value Pairs When you retrieve an element from a generic collection, you do not have to determine its data type or convert it.įor the examples in this topic, include using directives for the and System.Linq namespaces. A generic collection enforces type safety so that no other data type can be added to it. If your collection contains elements of only one data type, you can use one of the classes in the namespace. For some collections, you can assign a key to any object that you put into the collection so that you can quickly retrieve the object by using the key.Ī collection is a class, so you must declare an instance of the class before you can add elements to that collection. Unlike arrays, the group of objects you work with can grow and shrink dynamically as the needs of the application change. For information about arrays, see Arrays.Ĭollections provide a more flexible way to work with groups of objects. There are two ways to group objects: by creating arrays of objects, and by creating collections of objects.Īrrays are most useful for creating and working with a fixed number of strongly typed objects. For many applications, you want to create and manage groups of related objects. ![]()
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