使用TO_CHAR函数将CLOB转换为字符串: DECLARE v_clob CLOB; v_string VARCHAR2(4000); BEGIN v_clob := 'This is a sample CLOB.'; v_string := TO_CHAR(v_clob); DBMS_OUTPUT.PUT_LINE('CLOB as string: ' || v_string); END; 四、使用DBMS_LOB.CONVERTTOCLOB函数 DBMS_LOB.CONVERTTOCLOB函数...
* * @param clob the CLOB to convert * @return the String representation of the CLOB * @throws SQLException if an SQL error occurs * @throws IOException if an I/O error occurs */ public static String convertClobToString(Clob clob) throws SQLException, IOException { StringBuilder sb = new ...
l_string VARCHAR2(32767);BEGIN-- 获取CLOB字段的值SELECTclob_dataINTOl_clob_dataFROMmy_tableWHEREid=1;-- 将CLOB字段转换为BLOB字段l_blob_data :=DBMS_LOB.CONVERTTOBLOB(l_clob_data);-- 将BLOB字段转换为字符串l_string :=UTL_RAW.CAST_TO_VARCHAR2(l_blob_data);-- 打印结果DBMS_OUTPUT.PUT_L...
SQL CLOB 是 内置类型,它将字符大对象 (Character Large Object) 存储为数据库表某一行中的一个列值。默认情况下, 驱动程序使用 SQL locator(CLOB) 实现 Clob 对象,这意味着 CLOB 对象包含一个指向 SQL CLOB 数据的逻辑 指针而不是数据本身。Clob 对象在它被创...
2、varchar转clob使用to_clob()方法,其官方解释如下: The TO_CLOB function converts NCLOB values in a LOB column or other characterstrings to CLOB values. char can be any of the datatypes CHAR, VARCHAR2, NCHAR,NVARCHAR2, CLOB, or NCLOB. ...
2、varchar转clob使⽤to_clob()⽅法，其官⽅解释如下：The TO_CLOB function converts NCLOB values in a LOB column or other character strings to CLOB values. char can be any of the datatypes CHAR, VARCHAR2, NCHAR,NVARCHAR2, CLOB, or NCLOB.Oracle executes this function by converting the ...
2、varchar转clob使用to_clob()方法,其官方解释如下: The TO_CLOB function converts NCLOB values in a LOB column or other character strings to CLOB values. char can be any of the datatypes CHAR, VARCHAR2, NCHAR,NVARCHAR2, CLOB, or NCLOB. ...
CONVERT(char, dest_char_set[, source_char_set ]) Purpose CONVERTconverts a character string from one character set to another. The datatype of the returned value isVARCHAR2. Thecharargument is the value to be converted. It can be any of the datatypesCHAR,VARCHAR2,NCHAR,NVARCHAR2,CLOB, ...
Clob 包含字符数据的 OracleCLOB数据类型,根据服务器的默认字符集,其最大大小为 4 GB。 此数据类型映射到String。 NClob 包含字符数据的 OracleNCLOB数据类型,根据服务器的区域字符集,其最大大小为 4G 字节。 此数据类型映射到String。 OracleLob与OracleBFile的区别在于前者的数据存储在服务器上而不是存储在操作系统...
CAST does not directly support any of the LOB datatypes. When using CAST to convert a CLOB value into a character datatype, the database implicitly converts the LOB value to characters, and then explicitly casts the resulting value into the target datatype. If...