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MySQL. Index

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--Single field indexCREATE INDEXLast_name_index -  onemployee_tbl (last_name); Query OK,0Rows Affected (0.06sec)--Unique indexCREATE UNIQUE INDEXLast_name_unique_index -  onemployee_tbl (last_name); ERROR1062(23000): Duplicate Entry'GLASS'  for Key 'Last_name_unique_index'--Combined IndexCREATE INDEXOrder_index -  onorders_tbl (cust_id, prod_id); Query OK,0Rows Affected (0.02sec)--Modifying IndexesALTER INDEXindex_name--Delete IndexDROP INDEXLast_name_index -  onemployee_tbl; Query OK,0Rows Affected (0.03sec) Records:0Duplicates:0Warnings:0DROP INDEXOrder_index -  onorders_tbl; Query OK,0Rows Affected (0.04sec) Records:0Duplicates:0Warnings:0

MySQL. Index

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Related Keywords:
mysql order by index mysql undefined index create index syntax mysql mysql add index mysql index analyzer mysql index optimization mysql index range
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