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db2 substring function

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The realization method of reverse function in DB2 _db2

Oracle,sql server, and DB2 should also have its reverse function, because there is a certain application scenario. CREATE OR REPLACE FUNCTION REVERSE ( p1 varchar) RETURNS varchar (m) Specific "REVERSE" LANGUAGE SQL Deterministic NO EXTERNAL ACTION reads SQL DATA BEGIN declare v_str varchar (m) default '; DECLARE V_index INTEGER; --Define subs

DB2 to create a SQL function to get the first letter of Chinese pinyin

There are times when we need to index a set of data using letters from A to Z. If the data format is all half-width English is easy to achieve, but if the index of a group of Chinese data will cause a little trouble, data input database may not have specified an index letter, This requires the application to automatically generate information for indexing. In general, the index of Chinese data uses the first letter of the Chinese pinyin of the phrase, for example: Phrase Index letter －－－ －－－－

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