我们可以根据返回值进行相应的错误处理: DECLARE@textNVARCHAR(100)='Learning SQL Server';DECLARE@charNCHAR(1)='x';DECLARE@positionINT;SET@position=CHARINDEX(@char,@text);IF@position=0BEGINPRINT'Character not found in the string.';ENDELSEBEGINPRINT'Character found at position: '+CAST(@positionASNV...
SQL String Functions > INSTR Function The INSTR function in SQL is used to find the starting location of a pattern in a string. This function is available in MySQL and Oracle, though they have slightly different syntaxes: SyntaxThe syntax for the INSTR function is as follows: ...
SQL语句大全 –语 句功能 –数据操作 SELECT –从数据库表中检索数据行和列 INSERT –向数据库表添加新数据行 DELETE –从数据库表中删除数据行 UPDATE –更新数据库表中的数据 -数据定义 CREATE TABLE –创建一个数据库表 DROP TABLE –从数据库中删除表 ALTER TABLE –修改数据库表结构 CREATE VIEW –创建...
ERRCODE_STRING_DATA_RIGHT_TRUNCATION 报错:value too long for type character varying(xxx) 问题原因:字段长度超过了VARCHAR类型的长度限制。 解决方法:处理数据或将VARCHAR的长度设置得更长,或者将字段类型改为TEXT。 ERRCODE_PROGRAM_LIMIT_EXCEEDED或者Exceed Odps Scan Limit ...
ERRCODE_STRING_DATA_RIGHT_TRUNCATION 字符串右截断,多发生于VARCHAR字段的实际值超过了建表时VARCHAR指定的长度。 value too long for type character varying(xx) 重新建表修改VARCHAR字段的长度,或者将字段类型设置为TEXT。 ERRCODE_PROGRAM_LIMIT_EXCEEDED Exceed Odps Scan Limit 超过Hologres允许的上限,通常发生在扫...
SELECTp.FirstName,p.LastName,ROW_NUMBER()OVER(ORDERBYa.PostalCode)AS'Row Number',RANK()OVER(ORDERBYa.PostalCode)AS'Rank',DENSE_RANK()OVER(ORDERBYa.PostalCode)AS'Dense Rank',NTILE(4)OVER(ORDERBYa.PostalCode)AS'Quartile',s.SalesYTD,a.PostalCodeFROMSales.SalesPerson sINNERJOINPerson.Person pONs...
Specify a parameter name by using an at sign (@) as the first character. The parameter name must comply with the rules for identifiers. Parameters are local to the function; the same parameter names can be used in other functions. Parameters can take the place only of constants; they can...
The Oracle SQL version of INSTR also allows you to count backward, by entering the position argument as a negative number: INSTR('she sells seashells','s',-2,5) This will tell Oracle SQL to start at the second character from the end of the string (the last “l” in “seashells”) ...
10 /* retrieve the first character in the string */ 11 dbms_output.put_line ( SUBSTR (greetings, 1, 1)); 12 13 /* retrieve the last character in the string */ 14 dbms_output.put_line ( SUBSTR (greetings, -1, 1)); 15
Specifies the text to search for in column_name and the conditions for a match. <contains_search_condition> is nvarchar. An implicit conversion occurs when another character data type is used as input. Large string data types nvarchar(max) and varchar(max) cannot be used. In the following ...