Oracle 11.2和12c的SQL参考手册指出: The result of concatenating two character strings is another character string. If both character strings are of data type CHAR, then the result has data type CHAR and is limited to 2000 characters. If either string ...
2. Understanding String Concatenation in SQL String concatenation is a fundamental operation in SQL that allows us to combine two or more strings into one. This is particularly useful when constructing dynamic messages, formatting outputs, or combining fields from different columns into a single output...
ORA-01489 错误通常是由于 Oracle 数据库中字符串连接的结果过长导致的。 ORA-01489 错误消息 "result of string concatenation is too long" 指出在执行 SQL 查询时,字符串连接的结果超过了 Oracle 数据库允许的最大长度。在 Oracle 中,VARCHAR2 类型的最大长度为 4000 字节。当使用如 LISTAGG 这样的函数进行字...
缓冲区的问题导致的? 后来发现自己的SQL语句中的视图可能比较复杂,在尝试使用别的小的视图进行使用的时候发现可以使用 于是将整个视图分为三个不同的视图以后分别进行语句的编写 然后就好了,所以大概是因为视图的问题?挺奇怪的 报错:result of string concatenation is too long 究其原因,使用listagg进行分组拼接时,o...
问题解决了,不过留下了一个疑点:在Oracle 11gR2中,在cost明显很高的情况下,CBO是不应该选用CONCATENATION的,在wait4friend的测试过程中,使用SQL*Plus或者GUI的开发工具执行该SQL,都不会生成CONCATENATION的执行计划,为了重现这个问题,必须使用/*+ use_concat */来模拟。那么问题就奇怪了,为什么通过程序提交过来的SQL总...
As an AI language model, I can not check your code and/or execute the SQL statements. However, the error "result of string concatenation is too long" typically occurs when the result of a string concatenation operation is larger than the maximum size of a string in the database. In ...
A Introduction to the SQL for Oracle NoSQL Database ShellConcatenation Operator Syntax Copy concatenation_operator ::= "||" concatenate_expression ::= add_expression ("||" add_expression)* Semantics The concatenation operator returns the character string made by joining the operands in the given ...
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However, you can also find the plus sign being overloaded in the Sybase/SQL Server family and some products using a function call like CONCAT(s1, s2) instead. The SUBSTRING(< string > FROM < start > FOR < length >) function uses three arguments: the source string, the starting position...
http://nimishgarg.blogspot.com/2012/06/ora-01489-result-of-string.html http://docs.oracle.com/cd/B19306_01/server.102/b14219/e900.htmExample:SQL> SELECT LPAD('x',4000,'x') || LPAD('x',4000,'x') || LPAD('x',4000,'x') FROM DUAL; ...