SQL> declare 2 x varchar2(3) 3 begin 4 select reverse(ABC) into x from dual 5Is there any string function exists in ORACLE to reverse a string? A) Exists B)doest not exist.reverse does exist in 9i, 10g and 11g. I dont have anything lower to test on at the moment. I am fairly new to the PL/SQL world.I case there is a NULL the replace wont work obviously. But have you had any familiar cases in where you had to replace wildcards with empty strings? PL/SQL is case sensitive within string literals. For example, PL/SQL considers the following literals to be differentWhat Is a Collection? on. Thus, a varray can contain a varying number of elements, from zero (when empty) to the maximum specied in its type denition. PL/SQL offers these collection types: Associative arrays, also known as index-by tables, let you look up elements using arbitrary numbers and strings for subscript values.A varray can contain a varying number of elements, from zero (when empty) to the maximum specified in its type definition. DBMSOUTPUT.PUTLINE(emptychar is NULL) 15 END IF 16 END 17 /. PL/ SQL procedure successfully completed.Trim a text string in PL/SQL. 21.4.5. Test the strings for equality. I want a compatible SQL expression that will return true for not null and not empty strings.On SQL Server, , so the output of NULLIF will be NULL. On Oracle, is already NULL, so it gets passed through.
This is my test on SQL Server 2008 R2 Express SQL Server String Manipulation for URLs? I need to append a paramter-value xval9 to all non-blank SQL server column values in a multi-million row table.Can I put a constraint on a SQL server table to not allow the empty string? When we run the empty set operator, we are able to identify the empty and non- empty instances successfully.The collection LNTTVAR2 is empty. Need to learn to program with PL/SQL? In PL/SQL development, however, there isnt much of a unit test culture. Understandable you might say, since the majority of PL/SQL codePassing an empty string to the validatepasswordstrength function should return FALSE (or N in utPLSQL terms), but we get back TRUE. PL/SQL offers these collection types: Associative arrays, also known as index-by tables, let you look up elements using arbitrary numbers and strings for subscript values.A varray can contain a varying number of elements, from zero (when empty) to the maximum specified in its type definition.
As Phil noted, the empty string is treated as a NULL, and NULL is not equal or unequal to anything. If you expect empty strings or NULLs, youll need to handle those with NVL() Email codedump link for Oracle PL/SQL string compare issue.