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
AI代码解释 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...
This trace flag is useful if you need to save on space by allocating only the actual size required for the compressed backup. Using this trace flag might cause a slight performance penalty (a possible increase in the duration of the backup operation). For more information about the ...
语法:split(stringstr,stringpat) 返回值:array 说明:按照pat字符串分割str,会返回分割后的字符串数组 hive>selectsplit('abtcdtef','t')fromtableName; ["ab","cd","ef"] 集合查找函数: find_in_set语法:find_in_set(stringstr,stringstrList) 返回值:int 说明:返回str在strlist第一次出现的位置,str...
find_in_set(text,text[]) field(text,text[]) elt(int4,text[]) strcmp(text,text) insert(text,int8,int8,text) lcase(text) ucase(text) space(int4) mid(text,int8,int8) locate(text,text,int4) to_base64(text) from_base64(text) ...
using namespace std; int main() { string s; cin >> s; string t("HQ9"); if(s.find_first_of(t)!=-1)printf("YES\n"); else printf("NO\n"); return 0; } 题目本身并无难度,主要是借此机会对string类的find函数系列进行简单的总结: ...
publicstaticvoidmain(String[] args) throws JSQLParserException {Stringsql ="SELECT name,SUM(CASE WHEN sb.sblb = '1' THEN 1 ELSE 0 END) AS 待验证, SUM(CASE WHEN sb.sblb = '2' THEN 1 ELSE 0 END) AS 通过,SUM(CASE WHEN sb.sblb = '3' THEN 1 ELSE 0 END) AS 失效 FROM SBMP...
Cannot insert duplicate key row in object... Cannot insert the value NULL into column 'ID', table Cannot open backup device 'C:\TEMP\Demo.bak'. Operating system error 2(The system cannot find the file specified.). Cannot parse using OPENXML with namespace Cannot promote the transaction to...
In Microsoft SQL, you can find the spaces between the first and last name using various string manipulation functions. One approach is to use the CHARINDEX function, which returns the starting position of a specified substring within a string. By searching for the space character (' ') in the...
method_name - must match a value in the method_name column of SELECT * FROM sys.assembly_modules;. The method must be static. In a typical example for MyFood.dll, in which all types are in the MyFood namespace, the EXTERNAL NAME value could be MyFood.[MyFood.MyClass].MyStaticMethod...