The Oracle CONCAT() function returns the result (a string) of concatenating two string values. This function is equivalent to using the concatenation operator (||). It takes two string arguments and produces a
Examples of the Oracle CONCAT Function Here are some examples of the CONCAT function. I find that examples are the best way for me to learn about code, even with the explanation above. Example 1 This is a basic example of the CONCAT function. SELECTCONCAT('Databases ','are great')ASNEW_...
SELECTCONCAT(CONCAT('Happy',' coding'),' together')FROMdual;Code language:SQL (Structured Query Language)(sql) Try it In this example: The firstCONCAT()function concatenates two strings:'Happy'and' coding', and returns a result string. The secondCONCAT()function concatenates the result string ...
Concat(str1,str2)把两个字符串连接起来 select t.employeeid,concat(t.empfirstname,t.emplastname) as full_name from employees t 5、substr 函数 substr(STR1,2,5) 从字符串str1中的第二个字符开始,数5个 select substr('abc def hig',3,5) from dual; select t.empstreetaddress,substr(t.emps...
CONCAT(NCHAR, CLOB)returnsNCLOB Thisfunctionisequivalenttothe concatenation operator (||). See Also: "Concatenation Operator"forinformationonthe CONCAT operator Examples This example uses nestingtoconcatenate threecharacterstrings:SELECTCONCAT(CONCAT(last_name,'''s job category is'), ...
For example: SELECT column1, GROUP_CONCAT(column2) FROM table GROUP BY column1; This will produce a result set where the values from column2 are concatenated for each distinct value of column1. 2.2 Working with WHERE Clause: The GROUP_CONCAT function can also be used in conjunction with ...
CONCAT(NCHAR, CLOB)returnsNCLOB Thisfunctionisequivalenttothe concatenation operator (||). See Also: "Concatenation Operator"forinformationonthe CONCAT operator Examples This example uses nestingtoconcatenate threecharacterstrings:SELECTCONCAT(CONCAT(last_name,'''s job category is'), ...
l concat('Hello','World') 字符串连接,结果:HelloWorld l length(char):返回字符串的长度。 l substr(char,m,n):取字符串的子串,m表示起点,n 代表取 n 个字符的意思 l replace(char1,search_string,replace_string) 替换 l instr(char1,char2,[,n[,m]]) 取子串在字符串的位置(特别取某一个特殊...
RAW if the measure column is RAW; otherwise the return value is VARCHAR2. Aggregate Examples The following single-set aggregate example lists all of the employees in Department 30 in the hr.employees table, ordered by hire date and last name: SELECT LISTAGG(last_name, ‘; ‘) WITHIN GROUP...
选择concat(的,B)从双 某人/*连接的和B字符*/ 选择initcap('apple橙梨)从双 苹果桔子梨/**/把每个单词首字母变为大写 选择较低('apple”)从双 苹果/**/把字符串全部变为小写 选择上('apple”)从双 苹果/**/把字符串全部变为大写 选择工具('oracle函数大全','数,1,1),instrb('oracle函数 大全','...