（转载）http://hi.baidu.com/tfbzccqceabfhyd/item/bd01db9f8995204af04215e4
调用mysql_query( )，当查询操作是update、insert、delete时，返回的是true或者false，而操作执行的结果可能有三种：查询的字符串有错误；执行成功；执行不成功。执行select成功时，无论查询结果是否为空时，返回值都是对象
查询字符串中有错误，或者不成功都返回false
错误在mysql_error()中
成功返回true
mysql_query($sql) or die("error:".mysql_error())
error的列表，或者是errno的对照表
ER_HASHCHK 1000
ER_NISAMCHK 1001
ER_NO 1002
ER_YES 1003
ER_CANT_CREATE_FILE 1004
ER_CANT_CREATE_TABLE 1005
ER_CANT_CREATE_DB 1006
ER_DB_CREATE_EXISTS 1007
ER_DB_DROP_EXISTS 1008
ER_DB_DROP_DELETE 1009
ER_DB_DROP_RMDIR 1010
ER_CANT_DELETE_FILE 1011
ER_CANT_FIND_SYSTEM_REC 1012
ER_CANT_GET_STAT 1013
ER_CANT_GET_WD 1014
ER_CANT_LOCK 1015
ER_CANT_OPEN_FILE 1016
ER_FILE_NOT_FOUND 1017
ER_CANT_READ_DIR 1018
ER_CANT_SET_WD 1019
ER_CHECKREAD 1020
ER_DISK_FULL 1021
ER_DUP_KEY 1022
ER_ERROR_ON_CLOSE 1023
ER_ERROR_ON_READ 1024
ER_ERROR_ON_RENAME 1025
ER_ERROR_ON_WRITE 1026
ER_FILE_USED 1027
ER_FILSORT_ABORT 1028
ER_FORM_NOT_FOUND 1029
ER_GET_ERRNO 1030
ER_ILLEGAL_HA 1031
ER_KEY_NOT_FOUND 1032
ER_NOT_FORM_FILE 1033
ER_NOT_KEYFILE 1034
ER_OLD_KEYFILE 1035
ER_OPEN_AS_READONLY 1036
ER_OUTOFMEMORY 1037
ER_OUT_OF_SORTMEMORY 1038
ER_UNEXPECTED_EOF 1039
ER_CON_COUNT_ERROR 1040
ER_OUT_OF_RESOURCES 1041
ER_BAD_HOST_ERROR 1042
ER_HANDSHAKE_ERROR 1043
ER_DBACCESS_DENIED_ERROR 1044
ER_ACCESS_DENIED_ERROR 1045
ER_NO_DB_ERROR 1046
ER_UNKNOWN_COM_ERROR 1047
ER_BAD_NULL_ERROR 1048
ER_BAD_DB_ERROR 1049
ER_TABLE_EXISTS_ERROR 1050
ER_BAD_TABLE_ERROR 1051
ER_NON_UNIQ_ERROR 1052
ER_SERVER_SHUTDOWN 1053
ER_BAD_FIELD_ERROR 1054
ER_WRONG_FIELD_WITH_GROUP 1055
ER_WRONG_GROUP_FIELD 1056
ER_WRONG_SUM_SELECT 1057
ER_WRONG_VALUE_COUNT 1058
ER_TOO_LONG_IDENT 1059
ER_DUP_FIELDNAME 1060
ER_DUP_KEYNAME 1061
ER_DUP_ENTRY 1062
ER_WRONG_FIELD_SPEC 1063
ER_PARSE_ERROR 1064
ER_EMPTY_QUERY 1065
ER_NONUNIQ_TABLE 1066
ER_INVALID_DEFAULT 1067
ER_MULTIPLE_PRI_KEY 1068
ER_TOO_MANY_KEYS 1069
ER_TOO_MANY_KEY_PARTS 1070
ER_TOO_LONG_KEY 1071
ER_KEY_COLUMN_DOES_NOT_EXITS 1072
ER_BLOB_USED_AS_KEY 1073
ER_TOO_BIG_FIELDLENGTH 1074
ER_WRONG_AUTO_KEY 1075
ER_READY 1076
ER_NORMAL_SHUTDOWN 1077
ER_GOT_SIGNAL 1078
ER_SHUTDOWN_COMPLETE 1079
ER_FORCING_CLOSE 1080
ER_IPSOCK_ERROR 1081
ER_NO_SUCH_INDEX 1082
ER_WRONG_FIELD_TERMINATORS 1083
ER_BLOBS_AND_NO_TERMINATED 1084
ER_TEXTFILE_NOT_READABLE 1085
ER_FILE_EXISTS_ERROR 1086
ER_LOAD_INFO 1087
ER_ALTER_INFO 1088
ER_WRONG_SUB_KEY 1089
ER_CANT_REMOVE_ALL_FIELDS 1090
ER_CANT_DROP_FIELD_OR_KEY 1091
ER_INSERT_INFO 1092
ER_INSERT_TABLE_USED 1093
ER_NO_SUCH_THREAD 1094
ER_KILL_DENIED_ERROR 1095
ER_NO_TABLES_USED 1096
ER_TOO_BIG_SET 1097
ER_NO_UNIQUE_LOGFILE 1098
ER_TABLE_NOT_LOCKED_FOR_WRITE 1099
ER_TABLE_NOT_LOCKED 1100
ER_BLOB_CANT_HAVE_DEFAULT 1101
ER_WRONG_DB_NAME 1102
ER_WRONG_TABLE_NAME 1103
ER_TOO_BIG_SELECT 1104
ER_UNKNOWN_ERROR 1105
ER_UNKNOWN_PROCEDURE 1106
ER_WRONG_PARAMCOUNT_TO_PROCEDURE 1107
ER_WRONG_PARAMETERS_TO_PROCEDURE 1108
ER_UNKNOWN_TABLE 1109
ER_FIELD_SPECIFIED_TWICE 1110
ER_INVALID_GROUP_FUNC_USE 1111
ER_UNSUPPORTED_EXTENSION 1112
ER_TABLE_MUST_HAVE_COLUMNS 1113
ER_RECORD_FILE_FULL 1114
ER_UNKNOWN_CHARACTER_SET 1115
ER_TOO_MANY_TABLES 1116
ER_TOO_MANY_FIELDS 1117
ER_TOO_BIG_ROWSIZE 1118
ER_STACK_OVERRUN 1119
ER_WRONG_OUTER_JOIN 1120
ER_NULL_COLUMN_IN_INDEX 1121
ER_CANT_FIND_UDF 1122
ER_CANT_INITIALIZE_UDF 1123
ER_UDF_NO_PATHS 1124
ER_UDF_EXISTS 1125
ER_CANT_OPEN_LIBRARY 1126
ER_CANT_FIND_DL_ENTRY 1127
ER_FUNCTION_NOT_DEFINED 1128
ER_HOST_IS_BLOCKED 1129
ER_HOST_NOT_PRIVILEGED 1130
ER_PASSWORD_ANONYMOUS_USER 1131
ER_PASSWORD_NOT_ALLOWED 1132
ER_PASSWORD_NO_MATCH 1133
ER_UPDATE_INFO 1134
ER_CANT_CREATE_THREAD 1135
ER_WRONG_VALUE_COUNT_ON_ROW 1136
ER_CANT_REOPEN_TABLE 1137
ER_INVALID_USE_OF_NULL 1138
ER_REGEXP_ERROR 1139
ER_MIX_OF_GROUP_FUNC_AND_FIELDS 1140
ER_NONEXISTING_GRANT 1141
ER_TABLEACCESS_DENIED_ERROR 1142
ER_COLUMNACCESS_DENIED_ERROR 1143
ER_ILLEGAL_GRANT_FOR_TABLE 1144
ER_GRANT_WRONG_HOST_OR_USER 1145
ER_NO_SUCH_TABLE 1146
ER_NONEXISTING_TABLE_GRANT 1147
ER_NOT_ALLOWED_COMMAND 1148
ER_SYNTAX_ERROR 1149
ER_DELAYED_CANT_CHANGE_LOCK 1150
ER_TOO_MANY_DELAYED_THREADS 1151
ER_ABORTING_CONNECTION 1152
ER_NET_PACKET_TOO_LARGE 1153
ER_NET_READ_ERROR_FROM_PIPE 1154
ER_NET_FCNTL_ERROR 1155
ER_NET_PACKETS_OUT_OF_ORDER 1156
ER_NET_UNCOMPRESS_ERROR 1157
ER_NET_READ_ERROR 1158
ER_NET_READ_INTERRUPTED 1159
ER_NET_ERROR_ON_WRITE 1160
ER_NET_WRITE_INTERRUPTED 1161
ER_TOO_LONG_STRING 1162
ER_TABLE_CANT_HANDLE_BLOB 1163
ER_TABLE_CANT_HANDLE_AUTO_INCREMENT 1164
ER_DELAYED_INSERT_TABLE_LOCKED 1165
ER_WRONG_COLUMN_NAME 1166
ER_WRONG_KEY_COLUMN 1167
ER_WRONG_MRG_TABLE 1168
ER_DUP_UNIQUE 1169
ER_BLOB_KEY_WITHOUT_LENGTH 1170
ER_PRIMARY_CANT_HAVE_NULL 1171
ER_TOO_MANY_ROWS 1172
ER_REQUIRES_PRIMARY_KEY 1173
ER_NO_RAID_COMPILED 1174
ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE 1175
ER_KEY_DOES_NOT_EXITS 1176
ER_CHECK_NO_SUCH_TABLE 1177
ER_CHECK_NOT_IMPLEMENTED 1178
ER_CANT_DO_THIS_DURING_AN_TRANSACTION 1179
ER_ERROR_DURING_COMMIT 1180
ER_ERROR_DURING_ROLLBACK 1181
ER_ERROR_DURING_FLUSH_LOGS 1182
ER_ERROR_DURING_CHECKPOINT 1183
ER_NEW_ABORTING_CONNECTION 1184
ER_DUMP_NOT_IMPLEMENTED 1185
ER_FLUSH_MASTER_BINLOG_CLOSED 1186
ER_INDEX_REBUILD 1187
ER_MASTER 1188
ER_MASTER_NET_READ 1189
ER_MASTER_NET_WRITE 1190
ER_FT_MATCHING_KEY_NOT_FOUND 1191
ER_LOCK_OR_ACTIVE_TRANSACTION 1192
ER_UNKNOWN_SYSTEM_VARIABLE 1193
ER_CRASHED_ON_USAGE 1194
ER_CRASHED_ON_REPAIR 1195
ER_WARNING_NOT_COMPLETE_ROLLBACK 1196
ER_TRANS_CACHE_FULL 1197
ER_SLAVE_MUST_STOP 1198
ER_SLAVE_NOT_RUNNING 1199
ER_BAD_SLAVE 1200
ER_MASTER_INFO 1201
ER_SLAVE_THREAD 1202
ER_TOO_MANY_USER_CONNECTIONS 1203
ER_SET_CONSTANTS_ONLY 1204
ER_LOCK_WAIT_TIMEOUT 1205
ER_LOCK_TABLE_FULL 1206
ER_READ_ONLY_TRANSACTION 1207
ER_DROP_DB_WITH_READ_LOCK 1208
ER_CREATE_DB_WITH_READ_LOCK 1209
ER_WRONG_ARGUMENTS 1210
ER_NO_PERMISSION_TO_CREATE_USER 1211
ER_UNION_TABLES_IN_DIFFERENT_DIR 1212
ER_LOCK_DEADLOCK 1213
ER_TABLE_CANT_HANDLE_FULLTEXT 1214
ER_CANNOT_ADD_FOREIGN 1215
ER_NO_REFERENCED_ROW 1216
ER_ROW_IS_REFERENCED 1217
ER_ERROR_MESSAGES 218