Column name alias with space : Alias « Query Select « Oracle PL/SQL Tutorial SQL> SQL> SQL> SQL> create table employees( 2 empno NUMBER(4) 3 , ename VARCHAR2(8) 4 , init VARCHAR2(5) 5 , job VARCHAR2(8) 6 ,
SELECT*FROMTESTWHERENAME='';SELECT*FROMTESTWHERENAME=' ';--包含一个空格SELECT*FROMTESTWHERENAME=' ';--包含两个空格 SELECTID, DATALENGTH(NAME)ASCOLUMN_LENFROMTEST; SELECT*FROMTESTWHERE''=' '; 如上测试,SQL Server跟Oracle不一样,在SQL Server中,’’跟null是不一样的,空字符串是空字符串,null...
A NUMBER column with an associated sequence and trigger is created in the Oracle database for each IDENTITY column in the MS SQL Server or Sybase database. Each time a row is inserted, the trigger queries the sequence for the next value and inserts that value into the IDENTITY column. How...
insert into test(id, name) values(1, null); insert into test(id, name) values(2, ''); insert into test(id, name) values(3, ' ');--包含一个空格 insert into test(id, name) values(4, ' ');--包含两个空格 1. 2. 3. 4. 5. 6. SELECT * FROM TEST WHERE NAME IS NULL; 1...
Your segment name should begin with a letter and use only letters, numbers, spaces or underscores ( _ ). The segment prompts get their default values from this field. The flexfield view generator will use your segment name as a column name and change all spaces and special characters to un...
SQL> COLUMN PLATFORM_NAME FORMAT A36 SQL> SELECT * FROMV$TRANSPORTABLE_PLATFORM ORDER BY PLATFORM_NAME; PLATFORM_ID PLATFORM_NAME ENDIAN_FORMAT --- --- 6 AIX-Based Systems (64-bit) Big 16 Apple Mac OS Big 19 HP IA Open VMS Little...
FIRST_NAME to FirstName LAST_NAME to LastName HIRE_DATE to HireDate SALARY to Salary Note: The aliases and display names can be changed in the Data Model page, either in the Diagram or in the Structure. a. Enter "IN (:Dept)" in the Condition field for the department name column, ...
You can also force the column name to use using the DEFINED_PK configuration directive. Doesn't work under Windows Operating System, it is simply disabled. DEFINED_PK This directive is used to defined the technical key to used to split the query between number of cores set with the ORACLE_...
# sql="SELECT COLUMN1, COLUMN2 FROM C##ORACLE.NEWTABLE" sql="select du.username,su.password,du.profile,du.account_status \ from dba_users du,sys.user$ su \ where du.username in (select username from sys.t_user_cfg) \ and du.username = su.name" ...
Doing so shows that the NRIC column data has been suitably masked (see Figure 22). The NRIC of the employee with last name RAJAH has been masked too, since conditional masking was removed from the masking definition. Figure 22: SQL Worksheet ...