ALTER TABLE informacje_osobowe ADD CONSTRAINT if_pk PRIMARY KEY ( if_id ); ALTER TABLE informacje_osobowe ADD CONSTRAINT if_unique UNIQUE ( if_pesel, if_telefon ); ALTER TABLE informacje_osobowe ADD ...
The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, locating a single record in a large table can take several seconds; with the ...
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