The DECODE function in Oracle is a versatile and powerful tool that allows users to perform conditional transformations on data within an SQL query. It is similar to the CASE statement, but it offers a more compact syntax, making it a popular choice for simplifying complex queries and improving...
∙Oracle 9i, Oracle 10g, Oracle 11g 例如：You could use the decode function in an SQL statement as follows:select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers;上面的sql语句相当于下面的IF-THEN-ELSE :IF supplier_...
defaultis optional. If no matches are found, the decode will returndefault. Ifdefaultis omitted, then the decode statement will return null (if no matches are found). Applies To: Oracle 9i, Oracle 10g, Oracle 11g For example: You could use the decode function in an SQL statement as follo...
Oracle 9i, Oracle 10g, Oracle 11g 例如: You could use the decode function in an SQL statement as follows: select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers; 上面的sql语句相当于下面的IF-THEN-ELSE : IF supplier_i...
Oracle 9i, Oracle 10g, Oracle 11g 例如: You could use the decode function in an SQL statement as follows: select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers; ...
Oracle 9i, Oracle 10g, Oracle 11g 例如: You could use the decode function in an SQL statement as follows: select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers; ...
5/3 PL/SQL: Statement ignored 5/10 PLS-00306: wrong number or types of arguments in call to 'DECODE' SQL> case完美通过: SQL> CREATE OR REPLACE FUNCTION is1gt0 RETURN VARCHAR2 IS BEGIN RETURN CASE 1 > 0 WHEN TRUE THEN 'true' ...
decode 在OraclePLSQL中, decode 具有和 IFTHENELSE 一样的功能。 decode 函数语法如下: decode expression , search , result , search , result.
在oracle世界,你可以使用: 1)case表达式 或者 2)decode函数 来实现逻辑判断。Oracle的DECODE函数功能很强,灵活运用的话可以避免多次扫描,从而提高查询的性能。而CASE是9i以后提供的语法,这个语法更加的灵活,提供了IF THEN ELSE的功能。 case表达式 case表达式,可分两种,简单和搜索,简单case后接表达式,如: ...
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