concat( string1, string2 ) string1isthefirststringtoconcatenate. string2isthesecondstringtoconcatenate. */ --||可以连接多个字符串 SQL>selectconcat('CSDN','_yeeXun')fromdual; CONCAT('CSDN','_YEEXUN') --- CSDN_yeeXun SQL>select'CSDN'||'_yeeXun'fromdual; 'CSDN'||'_YEEXUN' --- CSDN_y...
SQL Server: SELECT region_name + ' ' + store_name FROM Geography WHERE store_name = 'Boston'; 结果: 'East Boston'
SELECT CONCAT('Hello', 'World') AS Result FROM dual; -- 输出:HelloWorld SELECT 'Hello' || 'World' AS Result FROM dual; -- 输出:HelloWorld SELECT CONCAT('Hello', NULL) AS Result FROM dual; -- 输出:NULL SELECT 'Hello' || NULL AS Result FROM dual; -- 输出:NULL 在Oracle数据库中,...
Oracle String concatenation The || operator does a String concatenation in Oracle. You can use this in both SQL and pl/sql. For example: select kol1||kol2 from tablename; select kol1||' - '||kol2 from tablename; declare l_var varchar2(2000); begin l_var := 'abc'||'def'; end...
删除左边出现的字符串91RTRIM删除右边出现的字符串92SQL>selectltrim(rtrim('gao qian jing',''),'')fromdual;9394LTRIM(RTRIM('95---96gao qian jing97989911.SUBSTR(string,start,count)100取子字符串,从start开始,取count个101SQL> select substr('13088888888',3,8) from dual;102103SUBSTR('104---...
目前来看Nuclear fusion using magnetic confinement, in particular in the tokamak configuration, is a...
) return clob sql_macro is L_ROW DEPT_EMP_PV%rowtype; -- unused but establishes dependency L_QUERY long; begin select text into L_QUERY from ALL_VIEWS where OWNER = nvl(trim('"' from P_VIEW.SCHEMA_NAME), user) and VIEW_NAME = trim('"' from P_VIEW.TABLE_NAME); L_QUERY :...
SQL> insert into loadtest select * from all_objects; 30363 rows created. SQL> select count(*) from loadtest; COUNT(*) --- 30363 #在提交前就可以查询。 SQL> commit; Commit complete. 串行直接加载: SQL> insert /*+ append */ into loadtest 2 nologging...
SQL> INSERT INTO temp1 VALUES('Steven','King'); 1 row created. SQL> INSERT INTO temp1 VALUES('Neena',''); 1 row created. SQL> INSERT INTO temp1 VALUES('Lex','De Haan'); 1 row created. SQL> SQL> SELECT CONCAT( student_firstname, student_lastname) FROM temp1; ...
Concatenate strings Construct GeoPoint column Construct delegated media Gotham identifier (GID) Convert DMS to GeoPoint Convert GeoPoint to Geohash Convert GeoPoint to MGRS Convert GeoPoint to geometry Convert MGRS to GeoPoint Convert a string to date Convert a string to timestamp Convert base ...