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checking for lower case
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create table t1 ( a varchar(100) )\\ insert into t1 (a) values ( 'A' )\\ insert into t1 (a) values ( 'a' )\\ insert into t1 (a) values ( 'å' )\\ insert into t1 (a) values ( 'æ' )\\ select (case when a = upper( a ) then a || ' Is Upper' else a || ' Has lower' end) as r_upper, (case when not regexp_like(a, '[a-z]', 'c') then a || ' Is Upper' else a || ' Has lower' end) as r_reg from t1\\ drop table t1
absolute service time: 0,89 sec
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R_UPPER
R_REG
1
A Is Upper
A Is Upper
2
a Has lower
a Has lower
3
å Has lower
å Is Upper
4
æ Has lower
æ Is Upper