db2涓璿archar鍑芥暟鎬庝箞浣跨敤
扬州沐宇科技
2023-12-09 05:43:36
db2
鍦―B2涓紝VARCHAR鍑芥暟鐢ㄤ簬灏嗚〃杈惧紡杞崲涓篤ARCHAR鏁版嵁绫诲瀷銆傚畠鐨勮娉曞涓嬶細
VARCHAR(expression, length)
鍏朵腑锛宔xpression鏄杞崲鐨勮〃杈惧紡锛屽彲浠ユ槸涓€涓垪鍚嶃€佷竴涓〃杈惧紡銆佷竴涓父閲忕瓑锛沴ength鏄浆鎹㈠悗鐨刅ARCHAR鏁版嵁绫诲瀷鐨勯暱搴︺€?/p>
浠ヤ笅鏄竴浜涗娇鐢╒ARCHAR鍑芥暟鐨勭ず渚嬶細
- 灏嗕竴涓暣鏁板垪杞崲涓篤ARCHAR绫诲瀷锛?/li>
SELECT VARCHAR(column_name, length) FROM table_name;
- 灏嗕竴涓棩鏈熷垪杞崲涓烘寚瀹氶暱搴︾殑VARCHAR绫诲瀷锛?/li>
SELECT VARCHAR(date_column, 10) FROM table_name;
- 灏嗕竴涓〃杈惧紡杞崲涓篤ARCHAR绫诲瀷锛?/li>
SELECT VARCHAR(column1 + column2, 20) FROM table_name;
娉ㄦ剰锛氬湪浣跨敤VARCHAR鍑芥暟鏃讹紝闇€瑕佹牴鎹渶瑕佹寚瀹氳浆鎹㈠悗鐨刅ARCHAR闀垮害锛屼互纭繚鑳藉瀹圭撼杞崲鍚庣殑鏁版嵁銆?/p>
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