FETCH –检索一行查询结果 CLOSE –关闭游标 PREPARE –为动态执行准备SQL 语句 EXECUTE –动态地执行SQL 语句 DESCRIBE –描述准备好的查询 —局部变量 declare @id char(10) –set @id = ‘10010001’ select @id = ‘10010001’ —全局变量 —必须以@@开头 –IF ELSE declare @x int @y int @z int s...
sp_recompile (Transact-SQL) 存储过程可用于本机编译标量用户定义函数。 它将导致使用元数据中存在的定义重新编译该函数。 下面的示例演示 AdventureWorks2022 示例数据库中的标量 UDF。 SQL 复制 CREATE FUNCTION [dbo].[ufnLeadingZeros_native](@Value int) RETURNS varch...
WITH RECURSIVE ... ( SELECT ... UNION ALL SELECT ... ) CYCLE id SET is_cycle USING path; ANY_VALUE 函数(T626) 这个新的聚合函数可以从一组数据中返回任意一个非空值。例如: CREATE TABLE t1 ( a int, b int ); INSERT INTO t1 VALUES (1, 11), (1, 22), (1, 33); SELECT a, an...
OPENROWSET('provider_name', {'datasource';'user_id';'password'|'provider_string'} , { [ catalog. ] [ schema. ] object |'query'} ) OPENROWSET(BULK)語法是用來讀取外部檔案: syntaxsql OPENROWSET(BULK'data_file', {FORMATFILE='format_file_path'[<bulk_options>] |SINGLE_BLOB|SINGLE_CLOB|SI...
postgres将数字转字符串 pgsql数字转字符串,数据类型:整型: smallintintegerbigint任意精度数值: numeric(precision,scale) 精度、刻度浮点型: real序号类型(自增):serial bigserial字符类型:varchar(n) char(n) text日期类型:ti
"String or binary data would be truncated" and field specifications “Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted...
STRING, STRUCTURE, STYLE, SUBCLASS_ORIGIN, SUBMULTISET, SUBSTITUTE, SUBSTRING, SUM, SYMMETRIC, SYSTEM, SYSTEM_USER, TABLE, TABLESAMPLE, TABLE_NAME, TEMPORARY, THEN, TIES, TIME, TIMESTAMP, TIMESTAMPADD, TIMESTAMPDIFF, TIMEZONE_HOUR, TIMEZONE_MINUTE, TINYINT, TO, TOP_LEVEL_COUNT, TRAILING, TRA...
'MIDDLEINT', 'MIGRATE', 'MINUTE', 'MINUTE_MICROSECOND', 'MINUTE_SECOND', 'MIN_ROWS', 'MOD', 'MODE', 'MODIFIES', 'MODIFY', 'MONTH', 'MULTILINESTRING', 'MULTIPOINT', 'MULTIPOLYGON', 'MUTEX', 'MYSQL_ERRNO', 'NAME', 'NAMES', 'NATIONAL', 'NATURAL', 'NCHAR', 'NDB', 'NDBCLUSTE...
SELECT FORMATMESSAGE('Signed int %i, %d %i, %d, %+i, %+d, %+i, %+d', 5, -5, 50, -50, -11, -11, 11, 11); SELECT FORMATMESSAGE('Signed int with up to 3 leading zeros %03i', 5); SELECT FORMATMESSAGE('Signed int with up to 20 leading zeros %020i', 5); SELECT FORMAT...
UNIQUE and PRIMARY KEY constraints are always enforced. When importing into a character column that is defined with a NOT NULL constraint, BULK INSERT inserts a blank string when there's no value in the text file. At some point, you must examine the constraints on the whole table. If the...