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orAClE lEn

Try select CASE WHEN LEN(k.dname) > 10 THEN LEFT(k.dname, 9) + '...' ELSE k.dname END as dname, k.PKID,f.file_path, f.file_path,srv.protocol, CASE WHEN f.pkid IS NULL THEN '' ELSE f.pkid END content_file_id, (CASE WHEN (k.modif...

select num_rows * avg_row_len/1024/1024 from user_tables where table_name = EMP;--EMP为表名(表名大写查询)

table_name-表名tablespace_name-表空间名cluster_name-群集名称iot_name-IOT(Index Organized Table)索引组织表的名称status-状态pct_free-为一个块保留的空间百分比pct_used-一个块的使用水位的百分比ini_trans-初始交易的数量max_trans-交...

统计信息过旧,收集一下统计信息试试 收集表信息 begin dbms_stats.gather_table_stats( ownname=>'OWNER',tabname => 'TABLE' ,ESTIMATE_PERCENT=>100,degree=>8, CASCADE=>true); end; 收集用户信息 begin dbms_stats.gather_schema_stats(own...

Oracle 需要首先在数据库中, 创建好 类型 与 函数。 来实现一个 split 功能的处理。 CREATE OR REPLACE TYPE ty_row_str_split as object (strValue VARCHAR2 (4000)); / CREATE OR REPLACE TYPE ty_tbl_str_split IS TABLE OF ty_row_str_spli...

(1)定义split_type类型: CREATE OR REPLACE TYPE split_type IS TABLE OF VARCHAR2 (4000) / (2)定义split函数: CREATE OR REPLACE FUNCTION split (p_str IN VARCHAR2, p_delimiter IN VARCHAR2) RETURN split_type IS j INT := 0; i INT...

(1)定义split_type类型: CREATE OR REPLACE TYPE split_type IS TABLE OF VARCHAR2 (4000) / (2)定义split函数: CREATE OR REPLACE FUNCTION split (p_str IN VARCHAR2, p_delimiter IN VARCHAR2) RETURN split_type IS j INT := 0; i INT...

算天数,有这么复杂吗? select end-begin into len from dual; 看看这个结果是什么? 如果end和begin只进行日期计算,即时间不参与运算的话,代码如下: select to_date(to_char(end,'yyyy-mm-dd'),'yyyy-mm-dd')-to_date(to_char(begin,'yyyy-...

CREATE OR REPLACE FUNCTION fn_split(p_str IN VARCHAR2, p_delimiter IN VARCHAR2) RETURN ty_tbl_str_split IS j INT := 0; i INT := 1; len INT := 0; len1 INT := 0; str VARCHAR2(4000); str_split ty_tbl_str_split := ty_tbl_str_split(...

MYSQL没用过,不过我想case when then应该也是支持的吧: SELECT (CASE length(POPEDOM) WHEN 3 THEN substr(POPEDOM, 0, 2) WHEN 4 THEN substr(POPEDOM, 0, 3) WHEN 5 THEN substr(POPEDOM, 0, 2) WHEN 6 THEN substr(POPEDOM, 0, 3) WHEN 7 T...

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